Issue in add_query_arg function. wp-includes/functions.php - line 1142

[artprojectgroup]

If you add a query array like this:

<?php
$data =[
    'api_id'            => 'xxxxx==',
    'to'                => 123456,
    'text'              => "Prueba",
];
$url    = add_query_arg( $data , 'https://xxx.com' );

The $url you get is this: ​https://xxx.com?api_id=xxxxx=&to=123456&text=Prueba

The line 1142:

<?php
$ret = preg_replace( '#=(&|$)#', '$1', $ret );

Gets "xxxxx==" and return "xxxxx=".

Please fix it.

Kind regards.