Php array has key

Php key in array exists

<?php
$search_array = array('first' => null, 'second' => 4);

// returns false
isset($search_array['first']);

// returns true
array_key_exists('first', $search_array);
?>

Source: php.net

Php key exists

// Here's our fruity array
$fruits = ['apple', 'pear', 'banana'];

// Use it in an `if` statement
if (array_key_exists("banana", $fruits)) {
 // Do stuff because `banana` exists
}

// Store it for later use
$exists = array_key_exists("peach", $fruits);

Php array index exists

// Here's our fruity array
$fruits = ['apple', 'pear', 'banana'];

// Use it in an `if` statement
if (array_key_exists("banana", $fruits)) {
 // Do stuff because `banana` exists
}

// Store it for later use
$exists = array_key_exists("peach", $fruits);// Return it directlyreturn array_key_exists("pineapple", $fruits);

Php array has key

array_key_exists('key', $your_array);

Check array has keys in php

<?php

// The values in this arrays contains the names of the indexes (keys) 
// that should exist in the data array
$required = array('key1', 'key2', 'key3');

$data = array(
    'key1' => 10,
    'key2' => 20,
    'key3' => 30,
    'key4' => 40,
);

if (count(array_intersect_key(array_flip($required), $data)) === count($required)) {
    // All required keys exist!
}

Source: stackoverflow.com

Similar codes

0 vote193 views1 answer
Php json key value loop
PHP
-1 vote168 views5 answers
Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, string given in
PHP
0 vote210 views1 answer
Disable laravel passport
PHP
7 votes286 views3 answers
How to create wordpress shortcodes
PHP Wordpress
0 vote220 views1 answer
Img src php wordpress theme child
PHP Wordpress
0 vote189 views1 answer
Php after leave page
PHP
0 vote220 views1 answer
How to get webhook response in laravel
PHP Laravel
0 vote159 views1 answer
Not have permision elgg settings.php
PHP
3 votes186 views2 answers
Php get date from day of year
PHP
0 vote188 views3 answers
Laravel migration softdelete
PHP