Sublime Text
<?php $text_01 = "Tai lieu hoc HTML"; $text_02 = bin2hex($text_01); $text_03 = pack("H*",$text_02); echo $text_01; echo "<hr>"; echo $text_02; echo "<hr>"; echo $text_03; ?>
Tai lieu hoc HTML
546169206c69657520686f632048544d4c
Tai lieu hoc HTML