3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("one"=>1,"two"=>2,"three"=>3); echo "-----\nPointer\n-----"; foreach($a as &$b) { var_dump( key($a) ); var_dump( current($a) ); } var_dump( key($a) ); var_dump( current($a) ); echo "-----\nNo pointer\n-----"; foreach($a as $b) { var_dump( key($a) ); var_dump( current($a) ); } var_dump( key($a) ); var_dump( current($a) );
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
----- Pointer -----string(3) "one" int(1) string(3) "one" int(1) string(3) "one" int(1) string(3) "one" int(1) ----- No pointer -----string(3) "one" int(1) string(3) "one" int(1) string(3) "one" int(1) string(3) "one" int(1)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
----- Pointer -----string(3) "two" int(2) string(5) "three" int(3) NULL bool(false) NULL bool(false) ----- No pointer -----string(3) "two" int(2) string(3) "two" int(2) string(3) "two" int(2) string(3) "two" int(2)
preferences:
211.2 ms | 402 KiB | 212 Q