3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(0); $date = new DateTime('yesterday'); $null = null; var_dump($date->format('U')); var_dump($date < $null); var_dump($date > $null); var_dump($null < $date); var_dump($null > $date); if (class_exists('DateTimeImmutable')) { $dati = new DateTimeImmutable(); var_dump($dati < $date); var_dump($dati > $date); var_dump($null < $dati); var_dump($null > $dati); } else { echo 'Not Implemented'; }
Output for 5.5.4 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
string(10) "1400018400" bool(false) bool(true) bool(true) bool(false) bool(false) bool(true) bool(true) bool(false)
Output for 7.3.32 - 7.3.33, 7.4.26, 8.0.13
string(10) "1400025600" bool(false) bool(true) bool(true) bool(false) bool(false) bool(true) bool(true) bool(false)
Output for 5.5.0 - 5.5.3
string(10) "1400018400" bool(false) bool(true) bool(true) bool(false) bool(false) bool(false) bool(true) bool(false)
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
string(10) "1400018400" bool(false) bool(true) bool(true) bool(false) Not Implemented
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6

Process exited with code 255.
Output for 4.3.0 - 4.3.1
preferences:
268.12 ms | 401 KiB | 461 Q