Online PHP editor | refs for sZ0pI

<?php $array = array( 'val1', 'val2', 'val3', 'val4', 'val5', ); print_out( $array ); array_walk( $array, function( &$value, &$key ){ $tmp =& $value; $value = array( 'rule' => 'ctype_alnum', ); $key = $tmp; }); function print_out( $val ) { echo '<pre>'; var_dump( $val ); echo '</pre>'; } print_out( $array );