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run code in 300+ PHP versions simultaneously
<?php function foo($a) { $page = isset($a['page']) ? a['page'] : 1; echo $page, "\n"; echo $a['page'] ?? 1; } $a = array(); foo($a); $a = array('page' => Null); foo($a); $a = array('page' => 0); foo($a); ?>
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
1 11 1 Fatal error: Uncaught Error: Undefined constant "a" in /in/0jhLN:4 Stack trace: #0 /in/0jhLN(18): foo(Array) #1 {main} thrown in /in/0jhLN on line 4
Process exited with code 255.
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 1 11 1 Fatal error: Uncaught Error: Undefined constant "a" in /in/0jhLN:4 Stack trace: #0 /in/0jhLN(18): foo(Array) #1 {main} thrown in /in/0jhLN on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
1 11 1 Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/0jhLN on line 4 Warning: Illegal string offset 'page' in /in/0jhLN on line 4 a 0
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
1 11 1 Notice: Use of undefined constant a - assumed 'a' in /in/0jhLN on line 4 Warning: Illegal string offset 'page' in /in/0jhLN on line 4 a 0
Output for 5.6.0 - 5.6.23
Parse error: syntax error, unexpected '?' in /in/0jhLN on line 8
Process exited with code 255.
Output for 5.5.0 - 5.5.37
Parse error: syntax error, unexpected '[' in /in/0jhLN on line 4
Process exited with code 255.

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