Insert file to media library and attach it to post

attachMediaFromUrl.php

<?php
function attachMediaFromUrl( $url, $post_id = 0, $file_type = null ) {

    //Fetch Media And Set Path
    require_once( ABSPATH . 'wp-admin/includes/image.php' );
	$upload_dir = wp_upload_dir();
	$file_name 	= basename( $url );
	$image_data = @file_get_contents( $url );
	$file 		= wp_mkdir_p( $upload_dir['path'] ) ? $upload_dir['path'] : $upload_dir['basedir'];
	$file 		.= '/' . $file_name;
	
    //Insert Media
	@file_put_contents( $file, $image_data );
	
    //Check For File Type
	$wp_filetype 	= wp_check_filetype( $file_name, $file_type );
	$attachment 	= array(
		'post_title' 		=> sanitize_file_name( $file_name ),
		'post_status' 		=> 'inherit'
		'post_content' 		=> '',
		'post_mime_type' 	=> $wp_filetype['type'],
	);
    //Perform Insert and Update Meta Info
	$attach_id 		= wp_insert_attachment( $attachment, $file, $post_id );
	$attach_data 	= wp_generate_attachment_metadata( $attach_id, $file );
	wp_update_attachment_metadata( $attach_id, $attach_data );

	return $attach_id;

}
?>