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run code in 300+ PHP versions simultaneously
<?php $var = null; if ( !$var ) { echo 'without is_null() |'; } if ( is_null($var) ) { echo 'with is_null()'; }
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.26, 8.2.0 - 8.2.13, 8.3.0
without is_null() |with is_null()
preferences:
115.18 ms | 404 KiB | 200 Q