3v4l.org

run code in 300+ PHP versions simultaneously
<?php // works correctly $hash = (object) [ 'a' => 1, 'b' => 2, 'c' => 3, ]; foreach ($hash as $key => $value) { var_dump($key); unset($hash->$key); } echo "\n"; // BUG: skips item 'b' $hash = (object) [ 'a' => 1, 'b' => 2, 'c' => 3, ]; $it = new ArrayIterator($hash); foreach ($it as $key => $value) { var_dump($key); unset($hash->$key); }
Output for 7.0.0 - 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(1) "a" string(1) "b" string(1) "c" string(1) "a" string(1) "c"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
string(1) "a" string(1) "b" string(1) "c" string(1) "a" string(1) "b" string(1) "c"
preferences:
150.06 ms | 407 KiB | 5 Q