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run code in 300+ PHP versions simultaneously
<?php $a = []; echo 'isset function:' . PHP_EOL; var_dump(isset($a['foo'])); var_dump(isset($a['foo']['bar'])); echo PHP_EOL . 'NULL coalesce operator:' . PHP_EOL; var_dump($a['foo'] ?? false); var_dump($a['foo']['bar'] ?? false);
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
isset function: bool(false) bool(false) NULL coalesce operator: bool(false) bool(false)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 isset function: bool(false) bool(false) NULL coalesce operator: bool(false) bool(false)
preferences:
158.9 ms | 402 KiB | 162 Q