3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = []; print $a ?? 'b1'; print "\n"; print $a ?: 'b2'; print "\n"; print $c ?? 'a1'; print "\n"; print $c ?: 'a2'; print "\n";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Array to string conversion in /in/iCCa0 on line 5 Array b2 a1 Warning: Undefined variable $c in /in/iCCa0 on line 14 a2
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 Warning: Array to string conversion in /in/iCCa0 on line 5 Array b2 a1 Warning: Undefined variable $c in /in/iCCa0 on line 14 a2
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/iCCa0 on line 5 Array b2 a1 Notice: Undefined variable: c in /in/iCCa0 on line 14 a2

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