<?php $string = "1,2,3"; $array = explode(',', $string); var_dump($array); echo "\n---\n"; array_walk($array, function(int &$int){;}); var_dump($array); echo "\n---\n"; var_dump( array_map(function(int $i){ return $i; }, explode(',', $string)) ); echo "\n---\n"; var_dump( array_map(fn(int $i) => $i, explode(',', $string)) );
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