3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "null != 'string' -> "; var_dump(null != 'string'); echo "<br />"; echo "false != 'string' -> "; var_dump(false != 'string'); echo "<br />"; echo "0 != 'string' -> "; var_dump(0 != 'string'); echo "<br />"; echo "1 != 'string' -> "; var_dump(1 != 'string');

preferences:
34.17 ms | 402 KiB | 5 Q