Php ob_start () implements the variable program for storing images

After processing images with the php GD library, you can only use imagejpeg () this is often not required for output or writing to a file. For example, to store images in a database, you need to write the images into variables and save them. Use ob_start () to enable cache ob_get_contents () get the cache to write the image to the variable

The Code is as follows:

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<? Php $ ImgPath = "image address "; // Obtain image information $ imgPath can be a remote address List ($ srcWidth, $ srcHeight, $ type) = getimagesize ($ imgPath ); ... Switch ($ type ){ Case 1: $ imgCreate = 'imagecreatefromgif'; break; Case 2: $ imgCreate = 'imagecreatefromjpeg '; break; Case 3: $ imgCreate = 'imagecreatefrompng '; break; Default: return false; } $ Orig = $ imgCreate ($ imgPath ); ... // Enable Cache Ob_start (); // Generate an image Switch ($ type) { Case 1: imagegif ($ orig); break; Case 2: imagejpeg ($ orig); break; // best quality Case 3: imagepng ($ orig); break; // no compression Default: echo ''; break; } // Save the image to a variable $ ImageCode = ob_get_contents (); Ob_end_clean ();

If you do not want to save the image as a variable, it will be a waste of resources. This is also a fun test.