Code sharing for generating image thumbnails in PHP based on GD2 graphics library

Code sharing for generating image thumbnails based on PHP of GD2 graphics library ,. Code sharing for generating image thumbnails using PHP based on GD2 graphics library. use PHP to generate image thumbnails, make sure that your PHP Server has installed the GD2 graphics library and uses a class to generate image thumbnails based on the GD2 graphics library,

To use PHP to generate image thumbnails, make sure that the GD2 graphics library is installed on your PHP server to generate image thumbnails using a class.

1. usage

$ Resizeimage = new resizeimage ("Image source file address", "200", "100", "0", "thumbnail address"); // only use the preceding sentence, you can generate a thumbnail. the source file and the thumbnail address can be the same. 200,100 represents the width and height respectively.

2. thumbnail code

// Use the following classes to generate image thumbnails. <? Phpclass resizeimage {// image type var $ type; // The actual width var $ width; // the actual height var $ height; // The changed width var $ resize_width; // The height var $ resize_height after the change; // whether to cut the image var $ cut; // the source image var $ srcimg; // the target image address var $ dstimg; // create a temporary Image var $ im; function resizeimage ($ img, $ wid, $ hei, $ c, $ dstpath) {$ this-> srcimg = $ img; $ this-> resize_width = $ wid; $ this-> resize_height = $ hei; $ this-> cut = $ c; // Image type $ this-> type = strtolower (substr (Strrchr ($ this-> srcimg ,". "), 1); // initialize the image $ this-> initi_img (); // The destination image address $ this-> dst_img ($ dstpath ); // -- $ this-> width = imagesx ($ this-> im); $ this-> height = imagesy ($ this-> im ); // generate an image $ this-> newimg (); ImageDestroy ($ this-> im);} function newimg () {// ratio of the changed image $ resize_ratio = ($ this-> resize_width)/($ this-> resize_height ); // ratio of the actual image $ ratio = ($ this-> width)/($ this-> height); if ($ this-> cut) = "1 ") // Cut image {If ($ ratio >=$ resize_ratio) // high priority {$ newimg = imagecreatetruecolor ($ this-> resize_width, $ this-> resize_height); imagecopyresampled ($ newimg, $ this-> im, 0, 0, 0, 0, $ this-> resize_width, $ this-> resize_height, ($ this-> height) * $ resize_ratio ), $ this-> height); ImageJpeg ($ newimg, $ this-> dstimg);} if ($ ratio <$ resize_ratio) // width first {$ newimg = imagecreatetruecolor ($ this-> resize_width, $ this-> resize_height); imag Ecopyresampled ($ newimg, $ this-> im, 0, 0, 0, 0, $ this-> resize_width, $ this-> resize_height, $ this-> width, ($ this-> width)/$ resize_ratio); ImageJpeg ($ newimg, $ this-> dstimg );}} else // uncut graph {if ($ ratio >=$ resize_ratio) {$ newimg = imagecreatetruecolor ($ this-> resize_width, ($ this-> resize_width)/$ ratio ); imagecopyresampled ($ newimg, $ this-> im, 0, 0, 0, 0, $ this-> resize_width, ($ this-> resize_width)/$ ratio, $ This-> width, $ this-> height); ImageJpeg ($ newimg, $ this-> dstimg);} if ($ ratio <$ resize_ratio) {$ newimg = imagecreatetruecolor ($ this-> resize_height) * $ ratio, $ this-> resize_height); imagecopyresampled ($ newimg, $ this-> im, 0, 0, 0, 0, ($ this-> resize_height) * $ ratio, $ this-> resize_height, $ this-> width, $ this-> height); ImageJpeg ($ newimg, $ this-> dstimg) ;}}// initialize the image function initi_img () {if ($ this-> type = = "Jpg") {$ this-> im = imagecreatefromjpeg ($ this-> srcimg);} if ($ this-> type = "gif ") {$ this-> im = imagecreatefromgif ($ this-> srcimg);} if ($ this-> type = "png ") {$ this-> im = imagecreatefrompng ($ this-> srcimg) ;}// function dst_img ($ dstpath) {$ full_length = strlen ($ this-> srcimg); $ type_length = strlen ($ this-> type); $ name_length = $ full_length-$ type_length; $ name = substr ($ this-> srcimg, 0, $ name _ Length-1); $ this-> dstimg = $ dstpath; // echo $ this-> dstimg ;}}?>

Crop, you need to use PHP to generate image thumbnails. make sure that your PHP Server has installed the GD2 graphics library and uses a class to generate image thumbnails...