php - Remove white spaces between tags in HTML

Question

I am using the following code to remove white spaces in html. I only want to remove white spaces in betweens tags. But below code replaces all white spaces

I.E remove all white spaces in between ">" and "<"

//read the entire string
$str=file_get_contents('sample.txt');

//replace all white spaces
$str=str_replace("
", "",$str);
$str=str_replace("", "",$str);
$str=str_replace(" ", "",$str);

//write the entire string
file_put_contents('sample.txt', $str);

Answer 1

You need use a regular expresion.

Maybe you can use this:

$html = preg_replace('/>s+</m', '><', $html);

Test here https://repl.it/