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run code in 200+ php & hhvm versions
Bugs & Features
<?php $allowed = array('<p>', '<b>', '<i>', '<u>'); print_r(htmlspecialchars(implode(', ', $allowed)));
Output for 4.3.0 - 7.2.0
&lt;p&gt;, &lt;b&gt;, &lt;i&gt;, &lt;u&gt;