Online PHP editor | output for UoVhf

<?php $str = '1_10_10-Einzel.pdf'; var_export( preg_split('/[-_.]/', $str) ); echo "\n---\n"; var_export( preg_split('/-|_|\./', $str) ); echo "\n---\n"; var_export( preg_split('%[-_.]+%', $str) ); echo "\n---\n"; var_export( preg_split("/[-_.]+/", $str, 0, PREG_SPLIT_NO_EMPTY) ); echo "\n---\n"; var_export( preg_split('@[-_.]+@', $str, flags: PREG_SPLIT_NO_EMPTY) ); echo "\n---\n"; $args = [ 'pattern' => '#[-_.]+#', 'subject' => $str, 'flags' => PREG_SPLIT_NO_EMPTY, ]; var_export( preg_split(...$args) );