3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
65<?php define('MAX_LOOPS',5); function withRefValue($elements, $transform) { echo "\n---( Array with $elements element(s): )---\n"; //Build array: for ($i=0; $i<$elements; $i++) { $a[] = "v.$i"; } $counter=0; echo "--> State of array before loop:\n"; var_dump($a); echo "--> Do loop:\n"; foreach ($a as $k=>&$v) { echo " iteration $counter: \$k=$k; \$v=$v\n"; eval($transform); $counter++; if ($counter>MAX_LOOPS) { echo " ** Stuck in a loop! **\n"; break; } } echo "--> State of array after loop:\n"; var_dump($a); } echo "\nPopping elements off end of an unreferenced array, using &\$value."; $transform = 'array_pop($a);'; withRefValue(1, $transform); withRefValue(2, $transform); withRefValue(3, $transform); withRefValue(4, $transform); withRefValue(5, $transform); withRefValue(6, $transform);
based on ldasM
Output for hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
65 Popping elements off end of an unreferenced array, using &$value. ---( Array with 1 element(s): )--- --> State of array before loop: array(1) { [0]=> string(3) "v.0" } --> Do loop: iteration 0: $k=0; $v=v.0 --> State of array after loop: array(0) { } ---( Array with 2 element(s): )--- --> State of array before loop: array(2) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" } --> Do loop: iteration 0: $k=0; $v=v.0 --> State of array after loop: array(1) { [0]=> &string(3) "v.0" } ---( Array with 3 element(s): )--- --> State of array before loop: array(3) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 --> State of array after loop: array(1) { [0]=> string(3) "v.0" } ---( Array with 4 element(s): )--- --> State of array before loop: array(4) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 --> State of array after loop: array(2) { [0]=> string(3) "v.0" [1]=> &string(3) "v.1" } ---( Array with 5 element(s): )--- --> State of array before loop: array(5) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" [4]=> string(3) "v.4" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 --> State of array after loop: array(2) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" } ---( Array with 6 element(s): )--- --> State of array before loop: array(6) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" [4]=> string(3) "v.4" [5]=> string(3) "v.5" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 --> State of array after loop: array(3) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> &string(3) "v.2" }
Output for 5.2.2 - 5.6.28
65 Popping elements off end of an unreferenced array, using &$value. ---( Array with 1 element(s): )--- --> State of array before loop: array(1) { [0]=> string(3) "v.0" } --> Do loop: iteration 0: $k=0; $v=v.0 --> State of array after loop: array(0) { } ---( Array with 2 element(s): )--- --> State of array before loop: array(2) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=0; $v=v.0 --> State of array after loop: array(0) { } ---( Array with 3 element(s): )--- --> State of array before loop: array(3) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 --> State of array after loop: array(1) { [0]=> string(3) "v.0" } ---( Array with 4 element(s): )--- --> State of array before loop: array(4) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=0; $v=v.0 iteration 3: $k=0; $v=v.0 --> State of array after loop: array(0) { } ---( Array with 5 element(s): )--- --> State of array before loop: array(5) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" [4]=> string(3) "v.4" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 --> State of array after loop: array(2) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" } ---( Array with 6 element(s): )--- --> State of array before loop: array(6) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" [4]=> string(3) "v.4" [5]=> string(3) "v.5" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 iteration 3: $k=0; $v=v.0 iteration 4: $k=1; $v=v.1 --> State of array after loop: array(1) { [0]=> string(3) "v.0" }
Output for 5.0.0 - 5.2.1
65 Popping elements off end of an unreferenced array, using &$value. ---( Array with 1 element(s): )--- --> State of array before loop: array(1) { [0]=> string(3) "v.0" } --> Do loop: iteration 0: $k=0; $v=v.0 --> State of array after loop: array(0) { } ---( Array with 2 element(s): )--- --> State of array before loop: array(2) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 --> State of array after loop: array(0) { } ---( Array with 3 element(s): )--- --> State of array before loop: array(3) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 --> State of array after loop: array(0) { } ---( Array with 4 element(s): )--- --> State of array before loop: array(4) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 iteration 3: $k=3; $v=v.3 --> State of array after loop: array(0) { } ---( Array with 5 element(s): )--- --> State of array before loop: array(5) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" [4]=> string(3) "v.4" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 iteration 3: $k=3; $v=v.3 iteration 4: $k=4; $v=v.4 --> State of array after loop: array(0) { } ---( Array with 6 element(s): )--- --> State of array before loop: array(6) { [0]=> string(3) "v.0" [1]=> string(3) "v.1" [2]=> string(3) "v.2" [3]=> string(3) "v.3" [4]=> string(3) "v.4" [5]=> string(3) "v.5" } --> Do loop: iteration 0: $k=0; $v=v.0 iteration 1: $k=1; $v=v.1 iteration 2: $k=2; $v=v.2 iteration 3: $k=3; $v=v.3 iteration 4: $k=4; $v=v.4 iteration 5: $k=5; $v=v.5 ** Stuck in a loop! ** --> State of array after loop: array(0) { }
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/GMGUs on line 17
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/GMGUs on line 17
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/GMGUs on line 17
Process exited with code 255.