How to Access WordPress Functions in an External PHP File

To use any core functions of WordPress such as database query, theme, and hook we need to write code in a theme’s template file or in a plugin. There are cases developers have to use a separate PHP file or a framework alongside WordPress to do certain things. That’s why we need a way to access WordPress functions from outside.

It is kind of simple to add this feature to a PHP file. What you need to do is just include the wp-load.php file at the start of the file.

Let’s create a file called external.php in the root folder of WordPress. Here is its content:


    //query user
    if(is_user_logged_in() ) {
        $user = wp_get_current_user();
        echo "<p><b>Loggedin user:</b> {$user->data->user_login}</p>";
    //query comments
    global $wpdb;
    $comments = $wpdb->get_results($wpdb->prepare("SELECT * FROM {$wpdb->prefix}comments"));
    echo "<h3>Comments</h3>";
    foreach ($comments as $key => $comment) {
    	echo "<p>{$comment->comment_content}</p>";    	

After adding include('wp-load.php'), you can call any functions like you are wiring a WordPress plugin.

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