Search an array for the specific value and return its key

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I have a multidimensional array, which I want to search and returns its corresponding key so that I can again use the key and return more information from that corresponding array.

This is what my array looks like

$add_admin_menu_page = array();
$add_admin_menu_page[] = array('Dashboard', 'dashboard.php', 'dashboard');
$add_admin_menu_page[] = array('Posts', 'posts.php', 'posts');
$add_admin_menu_page[] = array('Comments', 'comments.php', 'comments');
$add_admin_menu_page[] = array('Tools', 'tools.php', 'tools');

This is what am doing currently to make it work

<?php
//global $add_admin_menu_page;
$page = "dashboard.php";
$key = array_search($page, $add_admin_menu_page);
var_dump($key);
?>

Above result outputs

bool(false)

asked 1 min ago

user3140617

65