3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = 'heLlo woRld!'; var_dump( preg_replace( '#\s+#', '', strtolower( $string ) ) );
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(11) "helloworld!"