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run code in 300+ PHP versions simultaneously
<?php $content="aaa <!--[if (gt IE 9)|!(IE)]><!--> <html lang=\"en\"> <!--<![endif]--> bbb"; $tagOpen="<!--[if (gt IE 9)|!(IE)]><!-->"; $tagClose="<!--<![endif]-->"; $condition='/'.preg_quote($tagOpen).'(.*?)'.preg_quote($tagClose).'/i'; $content=preg_replace($condition, '$1', $content); echo htmlentities('<pre>'.$content.'</pre>');
Output for git.master, git.master_jit, rfc.property-hooks
&lt;pre&gt;aaa &lt;html lang=&quot;en&quot;&gt; bbb&lt;/pre&gt;

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