To convert the PHP array to JSON, use the json_encode() function. The json_encode() is a built-in PHP function that converts an array to json. The json_encode() function returns the string containing a JSON equivalent of the value passed to it, as demonstrated by the numerically indexed array. We can also convert any JSON received from a server into JavaScript objects.

Objects and arrays can be converted into JSON using the json_encode() method.

Example:-

<?php

    $netflix = ['Black Mirror', '13 Reasons Why', 'Bird Box', 'Dirt'];

    $netJSON = json_encode($netflix);

    echo $netJSON."\n";
    
?>

Output

A numerically indexed PHP array is translated to the array literal in a JSON string. JSON_FORCE_OBJECT option can be used if you want that array to be output as the object instead.

Convert Associative Array to JSON

Let’s take the example of converting a key-value pair array to json.

Example:-

<?php

    $data = ['name' => 'Vijay', 'blog' => 'AppDividend', 'education' => 'BE'];
    $jsonData = json_encode($data);
    echo $jsonData."\n";
    
?>

Output:-