php - 如何在PHP中将字符串转换为数字？(How do I convert a string to a number in PHP?)

Question

I want to convert these types of values, '3' , '2.34' , '0.234343' , etc. to a number.

(我想将这些类型的值'3' ， '2.34' ， '0.234343'等转换为数字。)

In JavaScript we can use Number() , but is there any similar method available in PHP?

(在JavaScript中，我们可以使用Number() ，但是PHP中有可用的类似方法吗？)

Input             Output
'2'               2
'2.34'            2.34
'0.3454545'       0.3454545

  ask by Sara translate from so

Answer 1

You don't typically need to do this, since PHP will coerce the type for you in most circumstances.

(通常不需要这样做，因为PHP在大多数情况下都会为您强制类型。)

For situations where you do want to explicitly convert the type, cast it:

(对于那些你想显式转换型的情况下， 投它：)

$num = "3.14";
$int = (int)$num;
$float = (float)$num;