converter.php

/* * * * * * * * * * * * * * * * * * * * * * * * * * *  *
 * Get images uploaded with texteditor in base64 format *
 * Store this images in disk and replace src value with *
 * the url returing the image from the disk             *
 * * * * * * * * * * * * * * * * * * * * * * * * * * */

function b64toUrl ( $data )
{
    // Create blank dom object
    $dom = new \DOMDocument();

    // Load data in the dom object
    $dom->loadHTML($data);

    // Searching for the img tag
    $images = $dom->getElementsByTagName('img');

    foreach ($images as $image) {
        
        //Getting the value of src attribuite of img
        $raw = $image->getAttribute('src');

        /* If src tag has value data:image
         * than it is upload from device in
         * base64 format                  
         */
        if (preg_match('/data:image/', $raw)) {
            $name = uniqid();

            preg_match('/data:image\/(?<mime>.*?)\;/', $raw, $groups);
            $mimetype = $groups['mime'];
            $filepath = \Auth::user()->id . '/lectures/images/' . $name . '.' . $mimetype;
                
            // Convert base64 data to the image again    
            $img = Image::make($raw)
                ->encode($mimetype, 100);

            // Store the image in disk    
            Storage::put($filepath, $img);

            // Remove old src attribute value    
            $image->removeAttribute('src');
                
            // Set new src attribute value as a url that gives image in response.    
            $image->setAttribute('src', '/images/' . $filepath);
        }
    }

    // Return the dom html            
    return $dom->saveHTML();
}