如何将正则表达式标记转换为 PHP 中字符串中的所有匹配项？

Question

I want to convert my html strings which contain <p style=“text-align:center; others-style:value;”>Content</p> <p style=“text-align:center; others-style:value;”>Content</p> to <center>Content</center> , and <p style=“text-align:right; others-style:value;”>Content</p> <p style=“text-align:right; others-style:value;”>Content</p> to <right>Content</right> etc.

My previous question has an answer which can achieve this perfectly. Which is regex is:

$RegEx = '/<(.*)(text-align:)(.*)(center|left|right|justify|inherit|none)(.*)(\"|\”|\'|\’)>(.*)(<\/.*)/s';
$string = preg_replace($RegEx, '<$4>$7</$4>', $string);

However, my strings may contain more than one occurrences of the text-align. For example, I might have <div style='text-align:left; others-style:value;' class='any class'>Any Content That You Wish</div><p style=“text-align:center; others-style:value;”>Content</p> <div style='text-align:left; others-style:value;' class='any class'>Any Content That You Wish</div><p style=“text-align:center; others-style:value;”>Content</p> <div style='text-align:left; others-style:value;' class='any class'>Any Content That You Wish</div><p style=“text-align:center; others-style:value;”>Content</p> I want it to become <left>Any Content That You Wish</left><center>Content</center> , but it would just output <center>Content</center> .

How can I get what I want in PHP? Many thanks.

Answer 1

As I wrote in the comments, you should not use regex for manipulating html content. But only if you have non-nested tags in your html, you can go for it.

For this particular case, you can use this regex,

<(p|div).*?\bstyle\s*=\s*.*?text-align:([a-zA-Z]+).*?>(.*?)</\1>

And replace it with <\\2>\\3</\\2>

Regex Demo

PHP code demo

$html = '<p style=“text-align:center; others-style:value;”>Content</p>
<div style=‘text-align:left; others-style:value;’ class=‘any class’>Any Content That You Wish</div><p style=“text-align:center; others-style:value;”>Content</p>';

$newhtml = preg_replace("~<(p|div).*?\bstyle\s*=\s*.*?text-align:([a-zA-Z]+).*?>(.*?)</\\1>~", '<\2>\3</\2>', $html);
echo $newhtml;

Prints,

<center>Content</center>
<left>Any Content That You Wish</left><center>Content</center>