Bilder automatisch Generieren in php

/*
$facebook_photo_id = facebook_photo_upload(array(
	'url' => UrlToFile (required),
	'caption' => TextForPhoto (optional)
	'post_id' => PostID (optional)
));
*/
function facebook_photo_upload( $args ){
	$post_id = intval($args['post_id']);
	if(
		$post_id &&
		($facebook_photo_id = get_post_meta( $post_id, 'facebook_post_id', true ))
	) return $facebook_photo_id;
	require_once('sdk/autoload.php');
	$fb = new \Facebook\Facebook([
	  'app_id' => 'XXXXXXXXXX',
	  'app_secret' => 'XXXXXXXXXX',
	  'default_graph_version' => 'v2.10',
	  'default_access_token' => 'XXXXXXXXXX',
	]);


	$graphOptions = array(
		'url' => $args['url']
	);

	if($args['caption']) $graphOptions['caption'] = $args['caption'];

	try {
	  $response = $fb->post('/me/photos',$graphOptions);
	} catch(\Facebook\Exceptions\FacebookResponseException $e) {
		ob_start();
		var_dump($e);
		var_dump($args);
		$facebook_post_dump = ob_get_contents();
		ob_end_clean();
		wp_mail(
			get_option('admin_email'),
			'Facebook Post Fail',
			"<pre>$facebook_post_dump</pre>",
			array('Content-Type: text/html; charset=UTF-8')
		);
		return false;
	}
	$facebook_photo_id = json_decode((string) $response->getBody())->id;
	update_post_meta( $post_id, 'facebook_post_id', $facebook_photo_id );
	return $facebook_photo_id;
}

function tweet_media( $args ) {
	if($tweet_id = get_post_meta( $args['post_id'], 'tweet_id', true )) return $tweet_id;
	require_once('TwitterAPIExchange.php');
	$settings = array(
		'oauth_access_token' => "XXXXXXXXXX",
		'oauth_access_token_secret' => "XXXXXXXXXX",
		'consumer_key' => "XXXXXXXXXX",
		'consumer_secret' => "XXXXXXXXXX"
	);
	$twitter = new TwitterAPIExchange($settings);



	if ($args['attachment_url']) {
		$media = json_decode( (string) $twitter->buildOauth(
			'https://upload.twitter.com/1.1/media/upload.json',
			'POST'
			)->setPostfields(array(
				'media_data' => base64_encode(file_get_contents($args['attachment_url']))
			))->performRequest()
		);

		if (!$media->media_id_string) return false;
	}




	$tweet = ( strlen($args['text']."\n".$args['hashtags'].(($args['link'])? "\n".$args['link'] : '')) < 280 )?
		$args['text']."\n".$args['hashtags'].(($args['link'])? "\n".$args['link'] : '') :
		$args['text'].(($args['link'])? "\n".$args['link'] : '');


	$tweet = json_decode( (string) $twitter->buildOauth(
			'https://api.twitter.com/1.1/statuses/update.json',
			'POST'
		)->setPostfields(array(
			'status' => $tweet,
			'media_ids' => $media->media_id_string
		))->performRequest()
	);

	if ($tweet->id) {
		update_post_meta( $args['post_id'], 'tweet_id', $tweet->id );
	}else {
		ob_start();
		var_dump($tweet);
		$tweet_dump = ob_get_contents();
		ob_end_clean();
		wp_mail(
			get_option('admin_email'),
			'Tweet Fail',
			"<pre>$tweet_dump</pre>",
			array('Content-Type: text/html; charset=UTF-8')
		);
	}

function share_published_quote( $ID, $post ) {
	require_once('twitter/twitter.php');
	require_once('facebook/facebook.php');



	$facebook_photo_id = facebook_photo_upload(array(
		'url' => 'https://www.konzeptcode.com/wp-content/themes/konzeptcode-theme/inc/post-to-quote.php?blog_id='.get_current_blog_id().'&post_id='.$ID,
		'caption' => $post->post_excerpt."\n".$post->post_title."\n".tags_to_hashtags($ID),
		'post_id' => $ID
	));


	$tweet_id = tweet_media(array(
		'post_id' => $ID,
		'text' => $post->post_excerpt."\n".$post->post_title,
		'hashtags' => tags_to_hashtags($ID),
		'attachment_url' => 'https://www.konzeptcode.com/wp-content/themes/konzeptcode-theme/inc/post-to-quote.php?blog_id='.get_current_blog_id().'&post_id='.$ID
	));

}
add_action( 'publish_quote', 'share_published_quote', 10, 2 );

<?php
// Indem ich den Header so konfiguriere, sage ich aus, dass diese php Datei als eine Bilddatei ausgegeben werden soll.
header('Content-Type: image/jpeg');

// Die Essentiellen WordPress Dateien werden reingeladen
require_once("../../../../wp-load.php");

// Ich habe eine Multisite. Es wird auf den richtigen Blog gewechselt
switch_to_blog(intval($_GET['blog_id']));

// Initiale Variablen werden geholt
$post_id = intval($_GET['post_id']);
$hide_author = ($post_id)? boolval(get_post_meta($post_id, 'hide_author', true)) : boolval($_GET['hide_author']);


/* Essentielle Variablen */
$margin_bottom = 120;
$margin_left_right = 120;
$quote_size = 50;
$author_size = intval($quote_size / 1.5);
$padding = 50;
$quote = get_the_excerpt($post_id);
$author = get_the_title($post_id);
$file = get_the_post_thumbnail_url($post_id,'full');
$im = imagecreatefromjpeg($file);
$quote_font = get_template_directory().'/fonts/josefinsans/JosefinSans-Regular.ttf';
$author_font = get_template_directory().'/fonts/josefinsans/JosefinSans-Bold.ttf';
$white = imagecolorallocatealpha($im, 255, 255, 255,20);
$black = imagecolorallocate($im, 0, 0, 0);




/* Bildanpassung */
$imageDimensions = getimagesize($file);
$imageWidth = $imageDimensions[0];
$imageHeight = $imageDimensions[1];
$imageHeight = floor(($imageHeight/$imageWidth)*1920);
$imageWidth  = 1920;
$im = imagescale($im,$imageWidth,$imageHeight);
$im = imagecrop($im,[
    'x' => ($imageWidth > 1920)? ($imageWidth-1920)/2 : 0,
    'y' => ($imageHeight > 1920)? ($imageHeight-1080)/2 : 0,
    'width' => 1920,
    'height' => 1080
]);





/* Author */
$author_text_sizes = imagettfbbox( $author_size,0 , $author_font, $author );
$author_width = $author_text_sizes[4];
$author_height = $author_text_sizes[1];
$author_position_bottom = ($hide_author)? 1080-$padding : 1080-$author_height-$margin_bottom;





/* Copyright */
$author_text_sizes = imagettfbbox( $author_size/1.5 ,0 , $author_font, 'talhasariyuerek.com' );
$author_width = $author_text_sizes[4];
$author_height = $author_text_sizes[1];
imagettftext($im, $author_size/1.5 , 0, 1920-$author_width-120+$padding, 1080-$author_height-$padding/2, $white, $author_font, 'talhasariyuerek.com');







/* Satz Umbruch Aufbau */
$words = explode(' ', $quote);
$quote = '';
$currentLine = '';
foreach ($words as $position => $word) {
    if ($position === 0) {
        $currentLine = $word;
    } else {
        $textDimensions = imagettfbbox(
            $quote_size,
            0,
            $quote_font,
            $currentLine . ' ' . $word
        );
        $textLeft = min($textDimensions[0], $textDimensions[6]);
        $textRight = max($textDimensions[2], $textDimensions[4]);
        $textWidth = $textRight - $textLeft;
        if ($textWidth > 1680) {
            $quote .= $currentLine;
            $quote .= PHP_EOL;
            $currentLine = $word;
        } else {
            $currentLine .= ' ';
            $currentLine .= $word;
        }
    }
}
$quote .= $currentLine;
$text_size = imagettfbbox( $quote_size, 0, $quote_font, $quote );

$text_position_bottom = $author_position_bottom-$text_size[1]-1.5*$padding;



// Texthintergrund wird erstellt und eingebunden
imagefilledrectangle(
    $im,
    $margin_left_right-$padding, // links
    $text_position_bottom-$quote_size-$padding, // Oben
    1920 - 120 + $padding, // Rechts
    1080 - $margin_bottom + $padding, // Unten
    $white
);

// Das Zitat wird in das Bild geschrieben
imagettftext($im, $quote_size, 0, $margin_left_right, $text_position_bottom, $black, $quote_font, $quote);

// Wenn Autor gewünscht und gegeben wird der Autor hinzugefügt
if(!$hide_author) imagettftext($im, $author_size, 0, $margin_left_right, $author_position_bottom, $black, $author_font, $author);

// Die Verwendung von imagepng() ergibt bessere Textqualität als imagejpeg()
imagejpeg($im, NULL, 100);
imagedestroy($im);