How to cache images in memcached in php? -

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im trying cache images in memcached. tested code:

ob_start();  $image = imagecreatefrompng(root_dir."/img/welcome.png"); imagepng($image);  $memcache->set("my_image", ob_get_contents(), false, 3600);  ob_end_clean();

but not works. suggestions?


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