3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3); $b = &$a; foreach($a as $i => $v) { echo "$v\n"; unset($a[i]); } var_dump($a); var_dump($b);
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 Fatal error: Uncaught Error: Undefined constant "i" in /in/aSWrf:7 Stack trace: #0 {main} thrown in /in/aSWrf on line 7
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 Fatal error: Uncaught Error: Undefined constant "i" in /in/aSWrf:7 Stack trace: #0 {main} thrown in /in/aSWrf on line 7
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
1 Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/aSWrf on line 7 2 Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/aSWrf on line 7 3 Warning: Use of undefined constant i - assumed 'i' (this will throw an Error in a future version of PHP) in /in/aSWrf on line 7 array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
1 Notice: Use of undefined constant i - assumed 'i' in /in/aSWrf on line 7 2 Notice: Use of undefined constant i - assumed 'i' in /in/aSWrf on line 7 3 Notice: Use of undefined constant i - assumed 'i' in /in/aSWrf on line 7 array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }

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246.28 ms | 403 KiB | 330 Q