How to replace img tag attribute with regular php

The way PHP regularly replaces the img tag attribute is through the preg_match() function. This function is used to perform a regular expression match and return the number of matches. The preg_match() function stops the search after the first match.

#We can achieve this through the preg_match() function.

(Recommended tutorial: php tutorial)

Function introduction:

preg_match function is used to perform a regular expression matching.

Function syntax:

int preg_match( string $pattern ,string $subject [,array &$matches [,int $flags = 0 [,int $offset = 0]]] )

Return value:

Returns the number of matches of pattern. Its value will be 0 (no match) or 1 because preg_match() will stop searching after the first match. preg_match_all() differs from this in that it searches for the subject until it reaches the end. If an error occurs preg_match() returns FALSE.

Code implementation:

<?php
/*PHP正则提取图片img标记中的任意属性*/
$str = &#39;<center><img src="/uploads/images/20100516000.jpg" height="120" width="120"><br />PHP正则提取或更改图片img标记中的任意属性</center>&#39;;

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