Instagram Video Source Grabber

Instagram.php

<?php

/**
 * Instagram Class
 */
class Instagram 
{
	/**
	 * Clean Input
	 * 
	 * @param  string $data
	 * @return string
	 */
	public function clean_input($data)
	{
	    $data = trim($data);
	    $data = strip_tags($data);
	    return $data;
	}

	/**
	 * Clean input all
	 * @param  string $data
	 * @return string
	 */
	public function clean_input_all($data)
	{
	    $data = trim($data);
	    $data = stripslashes($data);
	    $data = strip_tags($data);
	    $data = htmlspecialchars($data);
	    return $data;
	}

	/**
	 * Get video Information 
	 * 
	 * @param  string $url
	 * @return json
	 */
	public function get_video($url = "")
	{
		$insta_link = $this->clean_input_all( $url );

		if( !empty($insta_link) ){
		    // header('Content-Type: application/json; charset=utf-8');
		    $response = $this->clean_input( @ file_get_contents($insta_link) );
		    $response_length = strlen($response);
		    $start_position = strpos( $response ,'window._sharedData = ' ); // the start position
		    $start_positionlength = strlen('window._sharedData = '); // string length to trim before
		    $jsondata = substr($response, ( $start_position + $start_positionlength ), - 5 ); 
		    return $jsondata; 
		} elseif( empty($insta_link) ) {
		    die(); //only accepts instaLink as parameter
		}
	}
}