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<?php $array2 = array( array('customer_id' => '01', 'categories' => '',), array('customer_id' => '02', 'categories' => '',), array('customer_id' => '03', 'categories' => '20,26,18',), array('customer_id' => '04', 'categories' => '45,118',), array('customer_id' => '05', 'categories' => '45,118,201,18,55',), ); $like = 18; $cat = array_column($array2, 'categories'); $match = preg_grep("/\b" . $like . "\b/", $cat); $res = array_intersect_key($array2, $match); Var_dump($res);
Output for 5.6.0 - 5.6.40, 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 - 8.3.26, 8.4.1 - 8.4.13
array(2) { [2]=> array(2) { ["customer_id"]=> string(2) "03" ["categories"]=> string(8) "20,26,18" } [4]=> array(2) { ["customer_id"]=> string(2) "05" ["categories"]=> string(16) "45,118,201,18,55" } }
preferences:
57.1 ms | 409 KiB | 5 Q