3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo null == 0? 'true': 'false'; echo 0 == "0"? 'true': 'false'; echo "0" == 0? 'true': 'false'; echo "0" == null? 'true' : 'false'; echo null == "0"? 'true' : 'false'; echo 0 == null? 'true' : 'false'; echo "" == 0? 'true' : 'false'; $test = new stdClass(); echo " " == null? 'true' : 'false';
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
truetruetruefalsefalsetruefalsefalse
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
truetruetruefalsefalsetruetruefalse

preferences:
138.7 ms | 403 KiB | 194 Q