The getimagesize function obtains the image length, width, and other information.

The getimagesize function obtains the image length, width, and other information.

The getimagesize function returns an array with four units. Index 0 contains the pixel value of the image width, Index 1 contains the pixel value of the image height. Index 2 is the mark of the image type: 1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF (intel byte order), 8 = TIFF (motorola byte order), 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC, 14 = IFF, 15 = WBMP, 16 = XBM. These tags correspond to the newly added IMAGETYPE constant in PHP 4.3.0. Index 3 is a text string with the content "height =" yyy "width =" xxx "and can be directly used for IMG marking. PHP official manual $ Images_array = array ("http://static.zend.com/img/logo.gif "); Foreach ($ images_array as $ image ){ List ($ width, $ height, $ type, $ attr) = getimagesize ($ image ); $ New_height = (int) (192/$ width * $ height ); Echo' '; }