How to search by key=>value in a multidimensional array in PHP ?

<?php // PHP program to carry out multidimensional array // search by key=>value // Function to recursively search for a // given key=>value  function search($array, $key, $value) { $results = array(); // if it is array if (is_array($array)) { // if array has required key and value // matched store result  if (isset($array[$key]) && $array[$key] == $value) { $results[] = $array; } // Iterate for each element in array foreach ($array as $subarray) { // recur through each element and append result  $results = array_merge($results, search($subarray, $key, $value)); } } return $results; } // Multidimensional array for student list $arr = array( "A" => array( 1 => array('rollNo'=>101, 'name'=>"AMIT"), 2 => array('rollNo'=>102, 'name'=>"BHUWAN"), 3 => array('rollNo'=>103, 'name'=>"BOB"), 4 => array('rollNo'=>104, 'name'=>"CAROT") ), "B" => array( 1 => array('rollNo'=>201, 'name'=>"ABHISHEK"), 2 => array('rollNo'=>202, 'name'=>"AMIT"), 3 => array('rollNo'=>203, 'name'=>"RONNY"), 4 => array('rollNo'=>204, 'name'=>"LOBO") ), "C" => array( 1 => array('rollNo'=>301, 'name'=>"ANMOL"), 2 => array('rollNo'=>302, 'name'=>"TONNY"), 3 => array('rollNo'=>303, 'name'=>"SANJI") ) ); $res = search($arr, 'name', 'AMIT'); foreach ($res as $var) { echo $var["rollNo"]." - ".$var['name'] . "<br>"; } ?> 

<?php // PHP program to carry out multidimensional // array search by key=>value // Function to iteratively search for a // given key=>value  function search($array, $key, $value) { // RecursiveArrayIterator to traverse an // unknown amount of sub arrays within // the outer array. $arrIt = new RecursiveArrayIterator($array); // RecursiveIteratorIterator used to iterate // through recursive iterators $it = new RecursiveIteratorIterator($arrIt); foreach ($it as $sub) { // Current active sub iterator $subArray = $it->getSubIterator(); if ($subArray[$key] === $value) { $result[] = iterator_to_array($subArray); } } return $result; } // Multidimensional array for students list $arr = array( "A" => array( 1 => array('name'=>"Alice", 'location'=>"Dehradun"), 2 => array('name'=>"BHUWAN", 'location'=>"Mumbai"), 3 => array('name'=>"BOB", 'location'=>"Delhi"), 4 => array('name'=>"CAROT", 'location'=>"Haryana") ), "B" => array( 1 => array('name'=>"ABHISHEK", 'location'=>"Dehradun"), 2 => array('name'=>"AMIT", 'location'=>"Delhi"), 3 => array('name'=>"RONNY", 'location'=>"Bengaluru"), 4 => array('name'=>"LOBO", 'location'=>"Pune") ), "C" => array( 1 => array('name'=>"ANMOL", 'location'=>"Delhi"), 2 => array('name'=>"TONNY", 'location'=>"Delhi"), 3 => array('name'=>"SANJI", 'location'=>"Haryana") ) ); $res = search($arr, 'location', 'Delhi'); foreach ($res as $var) { echo $var["name"]." - ".$var['location'] ."<br>"; } ?> 

<?php $array = array( array("id" => 1, "name" => "John"), array("id" => 2, "name" => "Jane"), array("id" => 3, "name" => "Doe") ); $key = "id"; $value = 2; $result = array_filter($array, function($subarray) use ($key, $value) { return isset($subarray[$key]) && $subarray[$key] == $value; }); if (!empty($result)) { print_r(array_shift($result)); } else { echo "No match found."; } ?>