Php key exists

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);

If don't exist key json php

<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
    echo "The 'first' element is in the array";
}
?>

Source: php.net

Php key_exists

PHP function key_exists($key, array $array) bool
------------------------------------------------
Checks if the given key or index exists in the array. The name of this function is array_key_exists() in PHP > 4.0.6.

Parameters:
int|string--$key--Value to check.
array--$array--An array with keys to check.
  
Returns:true on success or false on failure.

Similar codes

0 vote201 views1 answer
Verify laravel string must be null
PHP
1 vote244 views1 answer
Pass model in function laravel
PHP
22 votes215 views4 answers
Laravel orWhere
PHP
0 vote202 views1 answer
Save custom input field value into cart item
PHP
-2 votes205 views1 answer
Php curl_exec get response json
PHP
2 votes211 views3 answers
Php collection to array
PHP
0 vote217 views1 answer
Php apns notification source code
PHP
0 vote216 views1 answer
SQLSTATE[HY000]: General errorstring(58)
PHP
0 vote209 views2 answers
Php return multiple variables from function
PHP
4 votes204 views5 answers
Get specific key value from array php
PHP