<?php $a = [['a' => 1], ['a' => 3], ['a' => 5], ['a' => 7]]; foreach($a as &$item) { $item['b'] = $item['a'] + 1; } var_dump($a); echo "\n"; foreach($a as $item) { echo "{$item['a']} - {$item['b']}\n"; } echo "\n"; var_dump($a);
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