3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Only run if array_is_list() isn't available. if ( ! function_exists( 'array_is_list' ) ) { function array_is_list( array $arr ) { return array() === $arr || array_values( $arr ) === $arr; } for ( $i = 0; $i < 100000; ++$i ) { array_is_list( array() ); } }
preferences:
33.82 ms | 406 KiB | 5 Q