How to insert media programatically from URL in WordPress?

insert_media.php

<?php
$post_data = array('post_title' => $post_title);
$imagesrc = migrate_image($image_url, $post_id, $post_title, $post_data);

function migrate_image($image_url, $post_id, $desc, $post_data)
{
    // Need to require these files
    if (!function_exists('media_handle_upload')) {
        require_once ABSPATH . "wp-admin" . '/includes/image.php';
        require_once ABSPATH . "wp-admin" . '/includes/file.php';
        require_once ABSPATH . "wp-admin" . '/includes/media.php';
    }

    $url = $image_url;
    $tmp = download_url($url);
    if (is_wp_error($tmp)) {
        // download failed, handle error
        @unlink($tmp);
        echo "Error Image";
        var_dump( $tmp->get_error_messages( ) );
    }

    $file_array = array();

    // Set variables for storage
    // fix file filename for query strings
    // Here you can add other required extension like txt,pdf.
    preg_match('/[^\?]+\.(jpg|jpe|jpeg|gif|png)/i', $url, $matches);
    $file_array['name']     = basename($matches[0]);
    $file_array['tmp_name'] = $tmp;

    // If error storing temporarily, unlink
    if (is_wp_error($tmp)) {
        @unlink($file_array['tmp_name']);
        $file_array['tmp_name'] = '';
    }

    // do the validation and storage stuff
    $id = media_handle_sideload($file_array, $post_id, $desc, $post_data);
    
    // If error storing permanently, unlink
    if (is_wp_error($id)) {
        @unlink($file_array['tmp_name']);
        return $id;
    }

    $src = wp_get_attachment_url($id);
}