John Davidson

Message:

I created an array as follows.

<?php

$Users = [

"user1" => [

    "UserName" => "Ahabiby" ,

    "Password" => "12345678"

],

"user2" => [

    "UserName" => "admin" ,

    "Password" => "admin"

],

"user3" => [

    "UserName" => "MohammadQ" ,

    "Password" => "z12345678"

],

"user4" => [

    "UserName" => "sobhan" ,

    "Password" => "mz1235"

],

"user5" => [

    "UserName" => "ewqfw" ,

    "Password" => "qwscwcqq"

],

"user6" => [

    "UserName" => "adminKoskesh" ,

    "Password" => "UWOEIW"

]

];

My problem is how to create a structure when the two variables $username and $password are given to this structure in the array, first compare the $username completely with the "UserName" line in the array, and if there is a $password, compare it with the "Password" values in the array. Also check if the inputs are $username and $password if they were not in the array at all.

I wrote the code snippet myself, but it does not work perfectly because I do not want to add a feature that compares the inputs in the array if they are not complete.

<?php

    $username = "MohammadQ";

    $password = "z12345678";

    foreach(array_column($Users,"UserName") as $key){

        if($username == $key){

            foreach(array_column($Users,"Password") as $key){

                if($password == $key){

                    echo "Bingo!";

                    exit();

                }

            }

        }

    }

?>

---

My Answer:
php
$colors = array(
'red' => '#FF0000',
'green' => '#00FF00',
'blue' => '#0000FF'
);


To check if a specific key exists in the associative array, you can use the `array_key_exists()` function in PHP. Here's an example:

php
if (array_key_exists('red', $colors)) {
echo 'The key "red" exists in the array.';
} else {
echo 'The key "red" does not exist in the array.';
}


This will output: `The key "red" exists in the array.`

You can replace `'red'` with any other key you want to check for in the array.