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run code in 300+ PHP versions simultaneously
<?php $arr = [ [ 'a1' => true, 'b1' => 'abc', 'c1' => 'def' ], [ 'a2' => true, 'b2' => 'fgh', 'c2' => 'ijk', 'd2' => 'lmn', 'e2' => 'opq', ] ]; $iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr)); foreach($iterator as $key => $value) { var_dump($key . ': ' . $value); }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.27, 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
string(5) "a1: 1" string(7) "b1: abc" string(7) "c1: def" string(5) "a2: 1" string(7) "b2: fgh" string(7) "c2: ijk" string(7) "d2: lmn" string(7) "e2: opq"

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