<?php $array = array ( "1" => array("fruit","salad","vegetable"), "2" => array("beef","meat","sausage"), "3" => array("chocolate","cake","bread"), "4" => array("sausage","cake","bread"), ); $expl = explode(' ', "I love big sausage"); $array = array_filter($array, function($x) use ($expl) { return count(array_intersect($expl, $x)) > 0; }); var_dump(array_keys($array));
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