Online PHP editor | refs for rSl2r

<?php $content= <<<'DATA' ## Section title Lorem ipsum *dolores* sic amet. $E = mc^2$, and since : $$ \cos(3*\pi*\sqrt{2}) = \delta $$ DATA; $content = preg_replace_callback( '/^\$+(?:\R(?!\$+$).*)*\R\$+$(*SKIP)(*FAIL)|([*_])((?:(?!\1).)+)\1/m', function ($m) { return "<i>" . $m[2] . "</i>"; }, $content ); echo $content;