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run code in 300+ PHP versions simultaneously
<?php $pattern = '/\[CODE\](.*)\[\/CODE\]/'; $replacement = function($m) { return htmlentities($m[0]); }; $subject = <<<EOT <html> <body> <div id="box1">[CODE]<span class="test">Hello World</span>[/CODE]</div> <div id="box2">[CODE]<strong class="test2">Nice to meet you!</strong>[/CODE]</div> </body> </html> EOT; echo preg_replace($pattern, $replacement, $subject);

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