Online PHP editor | output for IOokf

@ 2018-11-27T13:47:30Z

<?php
$html = '<ul class="foo">
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
</ul>
<ul>
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
</ul>    
<ul class="foo">
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
</ul>';


$newHtml = preg_replace_callback("/(?<=<ul\sclass=\"foo\">).*?(?=<\/ul>)/s", function($ma){
    return preg_replace("/(?<=<li>)(.*)(?=<\/li>)/", '<svg class="icon"><use xlink:href="#foo"></use></svg>$1', $ma[0]);
}, $html);

echo $newHtml;

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: <ul class="foo"> <li><svg class="icon"><use xlink:href="#foo"></use></svg>Item 1</li> <li><svg class="icon"><use xlink:href="#foo"></use></svg>Item 2</li> <li><svg class="icon"><use xlink:href="#foo"></use></svg>Item 3</li> </ul> <ul> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ul> <ul class="foo"> <li><svg class="icon"><use xlink:href="#foo"></use></svg>Item 1</li> <li><svg class="icon"><use xlink:href="#foo"></use></svg>Item 2</li> <li><svg class="icon"><use xlink:href="#foo"></use></svg>Item 3</li> </ul>

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