3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test = array( 0, '', '0', 1, '1', '1.1', '1a1', '1e1', 'asdf' ); $result = array(); foreach ($test as $val) { $result[] = filter_var($val, FILTER_VALIDATE_FLOAT); } var_dump($test);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(9) { [0]=> int(0) [1]=> string(0) "" [2]=> string(1) "0" [3]=> int(1) [4]=> string(1) "1" [5]=> string(3) "1.1" [6]=> string(3) "1a1" [7]=> string(3) "1e1" [8]=> string(4) "asdf" }

preferences:
248.56 ms | 404 KiB | 362 Q