高效mongodb的php分页类（不使用skip）

原作者: [db:作者] 来自: [db:来源] 收藏邀请

mongodb分页skip+limit分页要先查出所有结果再去跳过，这样如果查询页面越往后效率越低。

如果能够通过查询条件查出每页结果的最后一条记录，在用最后一条记录作为查询条件去查下一页，这样每次都查询页面size条记录，效率不会差。

具体代码如下：包含mongodb.class.php， page.class.php， test.php

mongodb.class.php mongodb 操作类

<?php
function show_error($message, $status_code = 500, $heading = 'An Error Was Encountered')
{
echo $message, $status_code,PHP_EOL;
exit;
}

//MongoDB操作类
class DB
{

private $CI;
private $config_file = 'MongoDB';

private $connection;
private $db;
private $connection_string;

private $collection = '';
private $host;
private $port;
private $user;
private $pass;
private $dbname;
private $key;
private $persist;
private $persist_key;

private $selects = array();
private $wheres = array();
private $sorts = array();
private $page_sorts = array();

private $limit = 999999;
private $offset = 0;

/**
* --------------------------------------------------------------------------------
* CONSTRUCTOR
* --------------------------------------------------------------------------------
*
* Automatically check if the Mongo PECL extension has been installed/enabled.
* Generate the connection string and establish a connection to the MongoDB.
*/

public function __construct($MONGODB_CONFIG)
{
if(!class_exists('Mongo'))
{
   show_error("The MongoDB PECL extension has not been installed or enabled", 500);
}
/**
        $config['mongo_host'] = '221.234.43.144';
        $config['mongo_port'] = 27017;
        $config['mongo_db'] = 'test';
        $config['mongo_user'] = '';
        $config['mongo_pass'] = '';
        $config['mongo_persist'] = TRUE;
         *
         */
$this->connection_string($MONGODB_CONFIG);
$this->connect();
}

/**
* --------------------------------------------------------------------------------
* Switch_db
* --------------------------------------------------------------------------------
*
* Switch from default database to a different db
*/

public function switch_db($database = '')
{
if(empty($database))
{
   show_error("To switch MongoDB databases, a new database name must be specified", 500);
}
$this->dbname = $database;
try
{
   $this->db = $this->connection->{$this->dbname};
   return(TRUE);
}
catch(Exception $e)
{
   show_error("Unable to switch Mongo Databases: {$e->getMessage()}", 500);
}
}

/**
* --------------------------------------------------------------------------------
* SELECT FIELDS
* --------------------------------------------------------------------------------
*
* Determine which fields to include OR which to exclude during the query process.
* Currently, including and excluding at the same time is not available, so the
* $includes array will take precedence over the $excludes array. If you want to
* only choose fields to exclude, leave $includes an empty array().
*
* @usage: $this->mongo_db->select(array('foo', 'bar'))->get('foobar');
*/

public function select($includes = array(), $excludes = array())
{
   if(!is_array($includes))
   {
    $includes = array();
   }

   if(!is_array($excludes))
   {
    $excludes = array();
   }

   if(!empty($includes))
   {
    foreach($includes as $col)
    {
     $this->selects[$col] = 1;
    }
   }
   else
   {
    foreach($excludes as $col)
    {
     $this->selects[$col] = 0;
    }
   }
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents based on these search parameters. The $wheres array should
* be an associative array with the field as the key and the value as the search
* criteria.
*
* @usage = $this->mongo_db->where(array('foo' => 'bar'))->get('foobar');
*/

public function where($wheres = array())
{
   foreach($wheres as $wh => $val)
   {
    $this->wheres[$wh] = $val;
   }
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE_IN PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is in a given $in array().
*
* @usage = $this->mongo_db->where_in('foo', array('bar', 'zoo', 'blah'))->get('foobar');
*/

public function where_in($field = "", $in = array())
{
   $this->where_init($field);
   $this->wheres[$field]['$in'] = $in;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE_NOT_IN PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is not in a given $in array().
*
* @usage = $this->mongo_db->where_not_in('foo', array('bar', 'zoo', 'blah'))->get('foobar');
*/

public function where_not_in($field = "", $in = array())
{
   $this->where_init($field);
   $this->wheres[$field]['$nin'] = $in;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE GREATER THAN PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is greater than $x
*
* @usage = $this->mongo_db->where_gt('foo', 20);
*/

public function where_gt($field = "", $x)
{
   $this->where_init($field);
   $this->wheres[$field]['$gt'] = $x;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE GREATER THAN OR EQUAL TO PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is greater than or equal to $x
*
* @usage = $this->mongo_db->where_gte('foo', 20);
*/

public function where_gte($field = "", $x)
{
   $this->where_init($field);
   $this->wheres[$field]['$gte'] = $x;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE LESS THAN PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is less than $x
*
* @usage = $this->mongo_db->where_lt('foo', 20);
*/

public function where_lt($field = "", $x)
{
   $this->where_init($field);
   $this->wheres[$field]['$lt'] = $x;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE LESS THAN OR EQUAL TO PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is less than or equal to $x
*
* @usage = $this->mongo_db->where_lte('foo', 20);
*/

public function where_lte($field = "", $x)
{
   $this->where_init($field);
   $this->wheres[$field]['$lte'] = $x;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE BETWEEN PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is between $x and $y
*
* @usage = $this->mongo_db->where_between('foo', 20, 30);
*/

public function where_between($field = "", $x, $y)
{
   $this->where_init($field);
   $this->wheres[$field]['$gte'] = $x;
   $this->wheres[$field]['$lte'] = $y;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE BETWEEN AND NOT EQUAL TO PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is between but not equal to $x and $y
*
* @usage = $this->mongo_db->where_between_ne('foo', 20, 30);
*/

public function where_between_ne($field = "", $x, $y)
{
   $this->where_init($field);
   $this->wheres[$field]['$gt'] = $x;
   $this->wheres[$field]['$lt'] = $y;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE NOT EQUAL TO PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is not equal to $x
*
* @usage = $this->mongo_db->where_between('foo', 20, 30);
*/

public function where_ne($field = "", $x)
{
   $this->where_init($field);
   $this->wheres[$field]['$ne'] = $x;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE OR
* --------------------------------------------------------------------------------
*
* Get the documents where the value of a $field is in one or more values
*
* @usage = $this->mongo_db->where_or('foo', array( 'foo', 'bar', 'blegh' );
*/

public function where_or($field = "", $values)
{
   $this->where_init($field);
   $this->wheres[$field]['$or'] = $values;
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE AND
* --------------------------------------------------------------------------------
*
* Get the documents where the elements match the specified values
*
* @usage = $this->mongo_db->where_and( array ( 'foo' => 1, 'b' => 'someexample' );
*/

public function where_and( $elements_values = array() ) {
   foreach ( $elements_values as $element => $val ) {
    $this->wheres[$element] = $val;
   }
   return($this);
}

/**
* --------------------------------------------------------------------------------
* WHERE MOD
* --------------------------------------------------------------------------------
*
* Get the documents where $field % $mod = $result
*
* @usage = $this->mongo_db->where_mod( 'foo', 10, 1 );
*/

public function where_mod( $field, $num, $result ) {
   $this->where_init($field);
   $this->wheres[$field]['$mod'] = array ( $num, $result );
   return($this);
}

/**
* --------------------------------------------------------------------------------
* Where size
* --------------------------------------------------------------------------------
*
* Get the documents where the size of a field is in a given $size int
*
* @usage : $this->mongo_db->where_size('foo', 1)->get('foobar');
*/

public function where_size($field = "", $size = "")
{
$this->_where_init($field);
$this->wheres[$field]['$size'] = $size;
return ($this);
}

/**
* --------------------------------------------------------------------------------
* LIKE PARAMETERS
* --------------------------------------------------------------------------------
*
* Get the documents where the (string) value of a $field is like a value. The defaults
* allow for a case-insensitive search.
*
* @param $flags
* Allows for the typical regular expression flags:
* i = case insensitive
* m = multiline
* x = can contain comments
* l = locale
* s = dotall, "." matches everything, including newlines
* u = match unicode
*
* @param $enable_start_wildcard
* If set to anything other than TRUE, a starting line character "^" will be prepended
* to the search value, representing only searching for a value at the start of
* a new line.
*
* @param $enable_end_wildcard
* If set to anything other than TRUE, an ending line character "$" will be appended
* to the search value, representing only searching for a value at the end of
* a line.
*
* @usage = $this->mongo_db->like('foo', 'bar', 'im', FALSE, TRUE);
*/

public function like($field = "", $value = "", $flags = "i", $enable_start_wildcard = TRUE, $enable_end_wildcard = TRUE)
{
   $field = (string) trim($field);
   $this->where_init($field);
   $value = (string) trim($value);
   $value = quotemeta($value);

   if($enable_start_wildcard !== TRUE)
   {
    $value = "^" . $value;
   }

   if($enable_end_wildcard !== TRUE)
   {
    $value .= "$";
   }

   $regex = "/$value/$flags";
   $this->wheres[$field] = new MongoRegex($regex);
   return($this);
}

/**
* --------------------------------------------------------------------------------
* ORDER BY PARAMETERS
* --------------------------------------------------------------------------------
*
* Sort the documents based on the parameters passed. To set values to descending order,
* you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
* set to 1 (ASC).
*
* @usage = $this->mongo_db->where_between('foo', 20, 30);
*/

public function order_by($fields = array())
{
   foreach($fields as $col => $val)
   {
    if($val == -1 || $val === FALSE || strtolower($val) == 'desc')
    {
     $this->sorts[$col] = -1;
    }
    else
    {
     $this->sorts[$col] = 1;
    }
   }
   return($this);
}

/**
* --------------------------------------------------------------------------------
* LIMIT DOCUMENTS
* --------------------------------------------------------------------------------
*
* Limit the result set to $x number of documents
*
* @usage = $this->mongo_db->limit($x);
*/

public function limit($x = 99999) {
   if($x !== NULL && is_numeric($x) && $x >= 1)
   {
    $this->limit = (int) $x;
   }
   return($this);
}

/**
* --------------------------------------------------------------------------------
* OFFSET DOCUMENTS
* --------------------------------------------------------------------------------
*
* Offset the result set to skip $x number of documents
*
* @usage = $this->mongo_db->offset($x);
*/

public function offset($x = 0)
{
   if($x !== NULL && is_numeric($x) && $x >= 1)
   {
    $this->offset = (int) $x;
   }
   return($this);
}

/**
* --------------------------------------------------------------------------------
* GET_WHERE
* --------------------------------------------------------------------------------
*
* Get the documents based upon the passed parameters
*
* @usage = $this->mongo_db->get_where('foo', array('bar' => 'something'));
*/

public function get_where($collection = "", $where = array(), $limit = 99999)
{
return($this->where($where)->limit($limit)->get($collection));
}

/**
* --------------------------------------------------------------------------------
* GET
* --------------------------------------------------------------------------------
*
* Get the documents based upon the passed parameters
*
* @usage = $this->mongo_db->get('foo', array('bar' => 'something'));
*/

public function get($collection = "")
{
   if(empty($collection))
   {
    show_error("In order to retreive documents from MongoDB, a collection name must be passed", 500);
   }
   $results = array();
   $documents = $this->db->{$collection}->find($this->wheres, $this->selects)->limit((int) $this->limit)->skip((int) $this->offset)->sort($this->sorts);

$returns = array();

   foreach($documents as $doc):
    $returns[] = $doc;
   endforeach;
$this->clear();
   return($returns);

}

/**
* --------------------------------------------------------------------------------
* COUNT
* --------------------------------------------------------------------------------
*
* Count the documents based upon the passed parameters
*
* @usage = $this->mongo_db->get('foo');
*/

public function count($collection = "")
{
   if(empty($collection))
   {
    show_error("In order to retreive a count of documents from MongoDB, a collection name must be passed", 500);
   }
   $count = $this->db->{$collection}->find($this->wheres)->limit((int) $this->limit)->skip((int) $this->offset)->count();
   $this->clear();
   return($count);
}

/**
* 自增ID实现
* return insert_id
*/
private function insert_inc($table)
{
$update = array('$inc'=>array('id'=>1));
$query = array('table'=>$table);
$command = array(
'findandmodify'=>'_increase',
'update'=>$update,
'query'=>$query,
'new'=>true,
'upsert'=>true
);
$id = $this->db->command($command);
return $id['value']['id'];
}

/**
* --------------------------------------------------------------------------------
* INSERT
* --------------------------------------------------------------------------------
*
* Insert a new document into the passed collection
*
* @usage = $this->mongo_db->insert('foo', $data = array());
*/

public function insert($collection = "", $data = array()) {
   if(empty($collection))
   {
    show_error("No Mongo collection selected to insert into", 500);
   }

   if(count($data) == 0 || !is_array($data))
   {
    show_error("Nothing to insert into Mongo collection or insert is not an array", 500);
   }

   try
   {
   $inc = $this->insert_inc($collection);
   $data['_id'] = $inc;
    $result = $this->db->{$collection}->insert($data, array('fsync' => TRUE));
    if($result['ok'] || $result){
    return true;
   }
   else{
    return false;
   }
   }
   catch(MongoCursorException $e)
   {
    show_error("Insert of data into MongoDB failed: {$e->getMessage()}", 500);
   }

}

/**
* --------------------------------------------------------------------------------
* UPDATE
* --------------------------------------------------------------------------------
*
* Update a document into the passed collection
*
* @usage = $this->mongo_db->update('foo', $data = array());
*/

public function update($collection = "", $data = array(), $flage = false)
{
   if(empty($collection))
   {
    show_error("No Mongo collection selected to update", 500);
}
   if(count($data) == 0 || !is_array($data))
   {
    show_error("Nothing to update in Mongo collection or update is not an array", 500);
}
unset($data['_id']);
if($flage){
   $arr = $this->wheres;
   unset($arr['_id']);
   if(is_array($arr)){
    foreach($arr as $key => $w){
     unset($data[$key]);
    }
   }
}
try
   {
    $res = $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => TRUE, 'multiple' => FALSE));
   $this->clear();
   return $res;
   }
   catch(MongoCursorException $e)
   {
    show_error("Update of data into MongoDB failed: {$e->getMessage()}", 500);
   }

}

/**
* --------------------------------------------------------------------------------
* UPDATE_ALL
* --------------------------------------------------------------------------------
*
* Insert a new document into the passed collection
*
* @usage = $this->mongo_db->update_all('foo', $data = array());
*/

public function update_all($collection = "", $data = array()) {
   if(empty($collection))
   {
    show_error("No Mongo collection selected to update", 500);
   }

   if(count($data) == 0 || !is_array($data))
   {
    show_error("Nothing to update in Mongo collection or update is not an array", 500);
   }

   try
   {
    $this->db->{$collection}->update($this->wheres, array('$set' => $data), array('fsync' => TRUE, 'multiple' => TRUE));
   $this->clear();
    return(TRUE);
   }
   catch(MongoCursorException $e)
   {
    show_error("Update of data into MongoDB failed: {$e->getMessage()}", 500);
   }

}

/**
* --------------------------------------------------------------------------------
* DELETE
* --------------------------------------------------------------------------------
*
* delete document from the passed collection based upon certain criteria
*
* @usage = $this->mongo_db->delete('foo', $data = array());
*/

public function delete($collection, $where)
{
   if(empty($collection))
   {
    show_error("No Mongo collection selected to delete from", 500);
   }
if(!$where){
   show_error("No data input to delete", 500);
}
   try
   {
   $this->wheres = $where;
    $this->db->{$collection}->remove($this->wheres);
   $this->clear();
    return(TRUE);
   }
   catch(MongoCursorException $e)
   {
    show_error("Delete of data into MongoDB failed: {$e->getMessage()}", 500);
   }

}

/**
* --------------------------------------------------------------------------------
* DELETE_ALL
* --------------------------------------------------------------------------------
*
* Delete all documents from the passed collection based upon certain criteria
*
* @usage = $this->mongo_db->delete_all('foo', $data = array());
*/

public function delete_all($collection = "")
{
     if(empty($collection))
     {
      show_error("No Mongo collection selected to delete from", 500);
    }

   try
   {
    $this->db->{$collection}->remove($this->wheres, array('fsync' => TRUE, 'justOne' => FALSE));
   $this->clear();
    return(TRUE);
   }
   catch(MongoCursorException $e)
   {
    show_error("Delete of data into MongoDB failed: {$e->getMessage()}", 500);
   }

}

/**
* --------------------------------------------------------------------------------
* ADD_INDEX
* --------------------------------------------------------------------------------
*
* Ensure an index of the keys in a collection with optional parameters. To set values to descending order,
* you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
* set to 1 (ASC).
*
* @usage = $this->mongo_db->add_index($collection, array('first_name' => 'ASC', 'last_name' => -1), array('unique' => TRUE));
*/

public function add_index($collection = "", $keys = array(), $options = array())
{
if(empty($collection))
{
show_error("No Mongo collection specified to add index to", 500);
}

   if(empty($keys) || !is_array($keys))
   {
    show_error("Index could not be created to MongoDB Collection because no keys were specified", 500);
    }

   foreach($keys as $col => $val)
   {
    if($val == -1 || $val === FALSE || strtolower($val) == 'desc')
    {
     $keys[$col] = -1;
    }
    else
    {
     $keys[$col] = 1;
    }
   }

   if($this->db->{$collection}->ensureIndex($keys, $options) == TRUE)
   {
    $this->clear();
    return($this);
   }
   else
   {
    show_error("An error occured when trying to add an index to MongoDB Collection", 500);
}
}

/**
* --------------------------------------------------------------------------------
* REMOVE_INDEX
* --------------------------------------------------------------------------------
*
* Remove an index of the keys in a collection. To set values to descending order,
* you must pass values of either -1, FALSE, 'desc', or 'DESC', else they will be
* set to 1 (ASC).
*
* @usage = $this->mongo_db->remove_index($collection, array('first_name' => 'ASC', 'last_name' => -1));
*/

public function remove_index($collection = "", $keys = array())
{
if(empty($collection))
{
show_error("No Mongo collection specified to remove index from", 500);
}

   if(empty($keys) || !is_array($keys))
   {
    show_error("Index could not be removed from MongoDB Collection because no keys were specified", 500);
   }

   if($this->db->{$collection}->deleteIndex($keys, $options) == TRUE)
   {
    $this->clear();
    return($this);
   }
   else
   {
    show_error("An error occured when trying to remove an index from MongoDB Collection", 500);
}
}

/**
* --------------------------------------------------------------------------------
* REMOVE_ALL_INDEXES
* --------------------------------------------------------------------------------
*
* Remove all indexes from a collection.
*
* @usage = $this->mongo_db->remove_all_index($collection);
*/

public function remove_all_indexes($collection = "") {
if(empty($collection))
{
show_error("No Mongo collection specified to remove all indexes from", 500);
}

   $this->db->{$collection}->deleteIndexes();
   $this->clear();
   return($this);
}

/**
* --------------------------------------------------------------------------------
* LIST_INDEXES
* --------------------------------------------------------------------------------
*
* Lists all indexes in a collection.
*
* @usage = $this->mongo_db->list_indexes($collection);
*/
public function list_indexes($collection = "") {
if(empty($collection))
{
    show_error("No Mongo collection specified to remove all indexes from", 500);
   }
   return($this->db->{$collection}->getIndexInfo());
}

/**
* --------------------------------------------------------------------------------
* DROP COLLECTION
* --------------------------------------------------------------------------------
*
* Removes the specified collection from the database. Be careful because this
* can have some very large issues in production!
*/

public function drop_collection($collection = "")
{
    if(empty($collection))
   {
      show_error("No Mongo collection specified to drop from database", 500);
    }
    $this->db->{$collection}->drop();
    return TRUE;
}

/**
* --------------------------------------------------------------------------------
* CONNECT TO MONGODB
* --------------------------------------------------------------------------------
*
* Establish a connection to MongoDB using the connection string generated in
* the connection_string() method. If 'mongo_persist_key' was set to true in the
* config file, establish a persistent connection. We allow for only the 'persist'
* option to be set because we want to establish a connection immediately.
*/

private function connect() {
$options = array();
if($this->persist === TRUE)
{
$options['persist'] = isset($this->persist_key) && !empty($this->persist_key) ? $this->persist_key : 'ci_mongo_persist';
}

try
{
   $this->connection = new Mongo($this->connection_string, $options);
   $this->db = $this->connection->{$this->dbname};
   return($this);
}
catch(MongoConnectionException $e)
{
   show_error("Unable to connect to MongoDB: {$e->getMessage()}", 500);
}
}

/**
* --------------------------------------------------------------------------------
* BUILD CONNECTION STRING
* --------------------------------------------------------------------------------
*
* Build the connection string from the config file.
*/

private function connection_string($MONGODB_CONFIG)
{

$this->host = trim($MONGODB_CONFIG['HOST']);
$this->port = trim($MONGODB_CONFIG['PORT']);
$this->user = trim($MONGODB_CONFIG['USER']);
$this->pass = trim($MONGODB_CONFIG['PWD']);
$this->dbname = trim($MONGODB_CONFIG['DATABASE']);
$this->persist = trim($MONGODB_CONFIG['PERSIST']);
$this->persist_key = trim($MONGODB_CONFIG['PERSIST_KEY']);

$connection_string = "mongodb://";

if(empty($this->host))
{
show_error("The Host must be set to connect to MongoDB", 500);
}

if(empty($this->dbname))
{
show_error("The Database must be set to connect to MongoDB", 500);
}

if(!empty($this->user) && !empty($this->pass))
{
$connection_string .= "{$this->user}:{$this->pass}@";
}

if(isset($this->port) && !empty($this->port))
{
$connection_string .= "{$this->host}:{$this->port}/{$this->dbname}";
}
else
{
$connection_string .= "{$this->host}";
}

$this->connection_string = trim($connection_string);
}

/**
* --------------------------------------------------------------------------------
* CLEAR
* --------------------------------------------------------------------------------
*
* Resets the class variables to default settings
*/

private function clear()
{
$this->selects = array();
$this->wheres = array();
$this->limit = NULL;
$this->offset = NULL;
$this->sorts = array();
}

/**
* --------------------------------------------------------------------------------
* WHERE INITIALIZER
* --------------------------------------------------------------------------------
*
* Prepares parameters for insertion in $wheres array().
*/

private function where_init($param)
{
if(!isset($this->wheres[$param]))
{
   $this->wheres[$param] = array();
   }
}

/**
* --------------------------------------------------------------------------------
* 设置表
* --------------------------------------------------------------------------------
* 参数：
* $table 表名
*/
public function set_table($table){
$this->collection = $table;
}

/**
* --------------------------------------------------------------------------------
* 获取表名
* --------------------------------------------------------------------------------
*/
public function get_table(){
return $this->collection;
}

/**
* --------------------------------------------------------------------------------
* 设置表排序
* --------------------------------------------------------------------------------
* 参数：
* $orderby 排序
*/
public function set_orderby($orderby){
$this->page_sorts = $orderby;
}

/**
* --------------------------------------------------------------------------------
* 获取左边结果集
* --------------------------------------------------------------------------------
* 参数：
* $left 左边显示的个数
* $last 定位当前页的值
* $size 页面大小
*/
public function get_left($left, $last, $size = PAGE_SIZE){
if($last){
   $order = $this->nor_orderby();
   if($this->page_sorts[$this->key] == -1){
    $this->where_gt($this->key, $last);
   } else {
     $this->where_lt($this->key, $last);
   }
   return $this->limit($left * $size)->order_by($order)->get($this->collection);
}
}

/**
* --------------------------------------------------------------------------------
* 获取右边结果集
* --------------------------------------------------------------------------------
* 参数：
* $right 右边显示的个数
* $last 定位当前页的值
* $size 页面大小
*/
public function get_right($right, $last, $size = PAGE_SIZE){
if($last){
   if($this->page_sorts[$this->key] == -1){
    $this->where_lte($this->key, $last);
   } else {
    $this->where_gte($this->key, $last);
   }
}
return $this->limit($right * $size + 1)->order_by($this->page_sorts)->get($this->collection);
}

/**
* --------------------------------------------------------------------------------
* 设置key
* --------------------------------------------------------------------------------
* 参数：
* $key 设置索引主键
*/
public function set_key($key){
$this->key = $key;
}

/**
* --------------------------------------------------------------------------------
* 求反
* --------------------------------------------------------------------------------
*/
private function nor_orderby(){
foreach($this->page_sorts as $key => $order){
   if($order == -1){
    $orderby[$key] = 1;
   }else{
    $orderby[$key] = -1;
   }
}
return $orderby;
}

/**
* --------------------------------------------------------------------------------
* 获取上一页的值
* --------------------------------------------------------------------------------
* 参数：
* $last 定位当前页的值
* $size 页面大小
*/
public function get_prev($last, $size = PAGE_SIZE){
if($last){
   if($this->page_sorts[$this->key] == 1){
    $this->where_lt($this->key,$last)->order_by(array($this->key => -1));
   } else {
    $this->where_gt($this->key,$last)->order_by(array($this->key => 1));
   }
   $result = $this->limit($size)->get($this->collection);
}
return $result[$size - 1][$this->key];
}

/**
* --------------------------------------------------------------------------------
* 获取下一页的值
* --------------------------------------------------------------------------------
* 参数：
* $last 定位当前页的值
* $size 页面大小
*/
public function get_next($last, $size = PAGE_SIZE){
if($last){
   if($this->page_sorts[$this->key] == 1){
    $this->where_gte($this->key,$last);
   } else {
    $this->where_lte($this->key,$last);
   }
}
$result = $this->limit($size+1)->order_by($this->page_sorts)->get($this->collection);
return $result[$size][$this->key];
}

/**
* --------------------------------------------------------------------------------
* 获取最后一页的值
* --------------------------------------------------------------------------------
* 参数：
* $size 页面大小
*/
public function get_last($size = PAGE_SIZE){
$res = $this->count($this->collection) % $size;
$order = $this->nor_orderby();
if($res > 0){
   $result = $this->limit($res)->order_by($order)->get($this->collection);
   return $result[$res - 1][$this->key];
}else{
   $result = $this->limit($size)->order_by($order)->get($this->collection);
   return $result[$size - 1][$this->key];
}
}

/**
* --------------------------------------------------------------------------------
* 分页查询
* --------------------------------------------------------------------------------
* 参数：
* $last 定位当前页的值
* $size 页面大小
*/
public function page_query($last, $size = PAGE_SIZE){
if($last){
   if($this->page_sorts[$this->key]==1){
    $this->where_gte($this->key,$last);
   } else {
    $this->where_lte($this->key,$last);
   }
}
return $this->limit($size)->order_by($this->page_sorts)->get($this->collection);
}

/**
* 批量执行代码_插入
* @param String $collection
* @param 二维数组 $code
*/
public function execute_insert($collection,$code){
//将二维数组分成js格式
$strcode='';
foreach($code as $k=>$v){
   foreach($v as $kk=>$vv){
    $strcode.='db.getCollection("'.$collection.'").insert({ "'.$kk.'":"'.$vv.'" });';
   }
}
// retrun array([ok]=>1);
return $this->db->execute($code);
}

}
?>

page.class.php mongodb分页逻辑类

复制代码代码如下:

<?php
db = $DB;
$this->count = $this->db->count($this->db->get_table());
$url = SITE_ROOT.strtolower(CLASS_NAME).'/'.METHOD_NAME;
$this->url = $this->url ? $this->url : $url;
$set = $set ? $set : 5;
$this->set = $set;
$size = $size ? $size : PAGE_SIZE;
$this->size = $size;
$this->last = $last;
$this->prev = $DB->get_prev($this->last);
$this->next = $DB->get_next($this->last);
//$this->page = GET::UINT('page');
$this->page = $this->page ? $this->page : 1;
$this->total = @ceil($this->count / $this->size);
$this->key = $key;
$this->orderby = $orderby;
}

//输出分页链接
public function get_link(){
if($this->total != 1){
   $this->get_first();
   $this->get_prev();
   $this->get_center();
   $this->get_next();
   $this->get_last();
   $this->get_turnto();
}
if($this->link){
   $this->link = $this->turnto.$this->link.'共'.number_format($this->total).'页 '.number_format($this->count).'条记录';
}
if($this->turnto){
   $this->link .= '';
}
return $this->link;
}

//获取左边显示的个数
public function get_left(){
return $this->left = ($this->set - $this->page >= 0) ? ($this->page - 1) : $this->set;
}

//获取右边显示的个数
public function get_right(){
return $this->right = ($this->total - $this->page > $this->set) ? $this->set : ($this->total - $this->page);
}

//设置左边的结果集
public function set_left_result($left_result){
$this->leftresult = $left_result;
}

//设置右边的结果集
public function set_right_result($right_result){
$this->rightresult = $right_result;
}

//设置排序条件
public function set_orderby($orderby){
$this->orderby = $orderby;
}

//设置最后一页
public function set_last($last){
$this->lastd = $last;
}

//设置中间显示页码个数
public function set($set){
$this->set = $set;
}

//获取首页
private function get_first(){
if($this->page != 1){
   if($this->total > 0){
    $this->link.='首页';
   }
}
}

//获取上一页
private function get_prev(){
if($this->prev){
   $this->link.='上一页';
}
}

//中间显示
private function get_center(){
$start = ($this->page - $this->set) <= 0 ? 1 : ($this->page - $this->set);
$end = ($this->page + $this->set + 1 >= $this->total) ? $this->total + 1 : ($this->page + $this->set + 1);

$ii = $this->left;
$iii = 0;
//显示左边的
for($i = $start; $i < $end; $i++, $ii--, $iii++){
   if($this->page == $i){
    $this->link.=''.$i.'';
   }else{
    $the_id = $ii * $this->size - 1;
    if($the_id > 0){
     $this->link.=''.$i.'';
    }else{
     $the_id = ($iii - $this->left) * $this->size;
     $this->link.=''.$i.'';
    }
   }
}
}

//获取下一页
private function get_next(){
if($this->next){
   $this->link.='下一页';
}
}

//获取尾页
private function get_last(){
if($this->page != $this->total){
   $this->link.='尾页';
}
}

//跳转到
private function get_turnto(){
$this->turnto = '
转到第 <input type="text" name="p" style="width:25px;text-align:center"> 页';
}

//求反
public function nor_orderby(){
foreach($this->orderby as $key => $order){
   if($order==-1){
    $orderby[$key] = 1;
   }else{
    $orderby[$key] = -1;
   }
}
return $orderby;
}

//设置key
public function set_key($key){
$this->key = $key;
}

//分页操作
public function show(){
$this->set_key($this->key);
$this->set_orderby($this->orderby);
$left = $this->get_left();
$right = $this->get_right();
$leftresult = $this->db->get_left($left, $this->last);
$rightresult = $this->db->get_right($right, $this->last);
$this->set_left_result($leftresult);
$this->set_right_result($rightresult);
$last = $this->db->get_last();
$this->set_last($last);
return $this->get_link();
}
}
/*      调用例子rockmongo
global $DB;
$lastid = GET::UINT('id');
$table = 'log';
$key = '_id';
$orderby = array($key => -1);

$DB->set_table($table);
$DB->set_key($key);
$DB->set_orderby($orderby);

$log = $DB->page_query($lastid);

$page = new Page($lastid, $key, $orderby);
$pager = $page->show();
*/

test.php 测试代码

复制代码代码如下:

<?php
include "page.class.php";
include "mongodb.class.php";
define(PAGE_SIZE, 5);//每页大小
$config['HOST'] = '127.0.0.1';
$config['PORT'] = 20081; //mongodb端口
$config['DATABASE'] = 'domain';//mongodb数据库名
$config['USER'] = '';
$config['PWD'] = '';
$config['PERSIST'] = TRUE;

$DB = new DB($config);

$table = 'whois'; //mongodb collection名
$key = '_id';
$orderby = array($key => -1);

$DB->set_table($table);
$DB->set_key($key);
$DB->set_orderby($orderby);

$log = $DB->page_query($lastid,5);

$page = new Page($lastid, $key, $orderby);

echo $pager = $page->show();