3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tests = array( "42", 1337, 0x539, '0x539', 02471, '02471', (int)'02479', (int)'02471', 0b10100111001, '0b10100111001', 1337e0, '1337e0', "not numeric", array(), 9.1 ); foreach ($tests as $element) { var_export($element); if (is_numeric($element)) { echo " is numeric", PHP_EOL; } else { echo " is NOT numeric", PHP_EOL; } }

preferences:
36.24 ms | 402 KiB | 5 Q