WYSIWYG images empty - slackero/phpwcms GitHub Wiki

Historical article. This applies to older phpwcms 1.x releases only. Current branches already pass NULL as the second GD parameter, so the fix below is obsolete. See Updating PHP for the PHP versions each branch requires.

If your PHP version was upgraded to version 5.5 or 5.6 and images in the WYSIWYG editor are no longer rendered check the version of the file /image_resized.php. There you might find several GD related functions like imagepng(), imagejpeg()and imagegif(). Check the second parameter — if it looks like ($new_img, '', …) you have to replace '' by null.

Before, around line 115 (might not be 1:1 identical to your version):

	switch($img_target) {
		case 'jpg':	imagejpeg($new_img, '', $img_quality);
				break;
		case 'png':	imagepng($new_img, '', 9);
				break;
		case 'gif':	imagegif($new_img);
				break;
	}

	imagedestroy($new_img);
	imagedestroy($img_source);

} else {

	// error / no image
	header ('Content-type: image/png');
	$new_img = imagecreatetruecolor(75, 20);
	$text_color = imagecolorallocate($new_img, 255, 255, 255);
	imagestring($new_img, 1, 5, 5,  "Image Error", $text_color);
	imagepng($new_img, '', 9);

Change it to:

	switch($img_target) {
		case 'jpg':	imagejpeg($new_img, null, $img_quality);
				break;
		case 'png':	imagepng($new_img, null, 9);
				break;
		case 'gif':	imagegif($new_img);
				break;
	}

	imagedestroy($new_img);
	imagedestroy($img_source);

} else {

	// error / no image
	header ('Content-type: image/png');
	$new_img = imagecreatetruecolor(75, 20);
	$text_color = imagecolorallocate($new_img, 255, 255, 255);
	imagestring($new_img, 1, 5, 5,  "Image Error", $text_color);
	imagepng($new_img, null, 9);