3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $option = 'maxFileSize'; preg_match_all( '#((?:^|[A-Z])[a-z]+)#', $option, $matches ); if ( isset( $matches[1] ) && strlen( strtolower( implode( '_', $matches[1] ) ) ) >= strlen( $option ) ) { $option = strtolower( implode( '_', $matches[1] ) ); } var_dump( $option );
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(13) "max_file_size"
Output for hhvm-3.10.0

Process exited with code 153.