Phpcms cannot display thumbnails call to undefined function image_type_to_extension

Issue background:

Offline Phpcms Project No problem, the online phpcms newly added picture thumbnail shows a problem, check the PHP version, the offline is 5.5, the line is 5.1

Cause of the problem:

Looked at the error log on the line, showing:

PHP Fatal Error: Call to  undefined function image_type_to_extension ()

Search found Image_type_to_extension This method is php5.2 later.

Workaround:

1. Upgrade PHP to 5.2 or later

2. Modify the source code, add judgment statement

-Open './phpcms/libs/classes/image.class.php ' line 37th
-Find

$imagetype Strtolower (substr(image_type_to_extension ($imageinfo[2]), 1));

Replace it with a

if (function_exists(image_type_to_extension)) {        $imagetypestrtolower(  Substr(image_type_to_extension ($imageinfo[2]), 1)); }Else{        $imagetypestrtolower(substr($img ,strrpos($img, '. ') +1)); }

Phpcms cannot display thumbnails call to undefined function image_type_to_extension