Online PHP editor | output for ORKkR

<?php const REGEX = '/class=("gx-block"|"gx-block .*"|".* gx-block")/i'; const HTML1 = '<div class="gx-block">abc</div>'; const HTML2 = '<div class="xyz">abc (gx-block) def</div>'; const HTML3 = '<div class="gx-blockhhh">abc</div>'; echo preg_match(REGEX, HTML1) ? 'true' : 'false'; echo PHP_EOL; echo preg_match(REGEX, HTML2) ? 'true' : 'false'; echo PHP_EOL; echo preg_match(REGEX, HTML3) ? 'true' : 'false'; echo PHP_EOL;