https://blog.canopas.com/php-useful-encoding-and-decoding-functions-you-need-to-know-210e523a065f - json_encode

json_encode.php

<?php

# Example 1 (Associative array)

$users = array(array("id"=>"1", "name"=>"John"), array("id"=>"2", "name"=>"Michel"));
echo json_encode($users);

# output: [{"id":"1","name":"John"},{"id":"2","name":"Michel"}]


# Example 2 (Indexed array)

$users = array("John", "Michel");
echo json_encode($users);

# output: ["John","Michel"]

?>