3v4l.org

run code in 300+ PHP versions simultaneously
<?php $t=html_entity_decode("&#60b&#62vist&#60/b&#62", ENT_NOQUOTES); echo $t; echo str_replace(array("&#60b&#62", "&#60/b&#62"),"@",$t);

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37.51 ms | 402 KiB | 5 Q