3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3); $string = current($a); $i = 0; while(next($a) && strlen($string.current($a)) < 3){ $string .= current(a); } echo $string;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "a" in /in/mRR0d:6 Stack trace: #0 {main} thrown in /in/mRR0d on line 6
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
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/mRR0d on line 6 Warning: current() expects parameter 1 to be array, string given in /in/mRR0d on line 6 Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/mRR0d on line 6 Warning: current() expects parameter 1 to be array, string given in /in/mRR0d on line 6 1
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant a - assumed 'a' in /in/mRR0d on line 6 Warning: current() expects parameter 1 to be array, string given in /in/mRR0d on line 6 Notice: Use of undefined constant a - assumed 'a' in /in/mRR0d on line 6 Warning: current() expects parameter 1 to be array, string given in /in/mRR0d on line 6 1
Output for 4.4.1, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Use of undefined constant a - assumed 'a' in /in/mRR0d on line 6 Warning: current(): Passed variable is not an array or object in /in/mRR0d on line 6 Notice: Use of undefined constant a - assumed 'a' in /in/mRR0d on line 6 Warning: current(): Passed variable is not an array or object in /in/mRR0d on line 6 1
Output for 4.3.2 - 4.3.11, 4.4.0, 4.4.2 - 4.4.9, 5.0.0 - 5.0.5
Fatal error: Only variables can be passed by reference in /in/mRR0d on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Only variables can be passed by reference in /in/mRR0d on line 6

preferences:
314.52 ms | 401 KiB | 456 Q