3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a($value) { $frequency = (float) $value; return is_nan($frequency) ? null : $frequency; } function b($value) { $frequency = $value; return is_nan($frequency) ? null : (float) $frequency; } function meh($value) { var_dump(a($value) === b($value)); } foreach (array(0, NAN, "asdf", 2.4) as $value) { meh($value); }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(true) bool(true) Fatal error: Uncaught TypeError: is_nan(): Argument #1 ($num) must be of type float, string given in /in/pchku:10 Stack trace: #0 /in/pchku(10): is_nan('asdf') #1 /in/pchku(14): b('asdf') #2 /in/pchku(18): meh('asdf') #3 {main} thrown in /in/pchku on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
bool(true) bool(true) Warning: is_nan() expects parameter 1 to be float, string given in /in/pchku on line 10 bool(true) bool(true)
Output for 4.3.6 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
bool(true) bool(true) Warning: is_nan() expects parameter 1 to be double, string given in /in/pchku on line 10 bool(true) bool(true)
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/pchku on line 17 bool(true) Warning: is_nan() expects parameter 1 to be double, string given in /in/pchku on line 10 bool(false) Warning: is_nan() expects parameter 1 to be double, string given in /in/pchku on line 10 bool(true) bool(true)
preferences:
330.54 ms | 402 KiB | 456 Q