Image processing class (domestic edition)

: This article mainly introduces Image Processing (image processing). For more information about PHP tutorials, see.

 $ Info [0], 'height' => $ info [1], 'type' => image_type_to_extension ($ info [2], false ), 'Mime '=> $ info ['Mime']); // Obtain image information $ type = self: $ info ['type']; $ fun = "imagecreatefrom {$ type}"; self: $ image = $ fun ($ src );} /*** @ param int $ width $ height should be declared in the configuration file, cancel the creation and use of the parameter * @ return thumbnail image resource * thumbnail */public function thumb ($ width, $ height) {// New Town color image $ image_thumb = imagecreatetruecolor ($ width, $ height); # obtain the image width to height ratio $ src_m = self :$ info ['width']/self:: $ info ['height']; # ratio of space in the source file to $ dst_m = $ width/$ height; # The width to height in the thumbnail # The width of the source file image is N: 1, change the height if ($ src_m> $ dst_m) {$ cha_width = $ width; $ cha_height = ceil ($ width/$ src_m);} else {# the source file image is 1: the height of the N type remains unchanged. change the width $ cha_width = floor ($ height * $ src_m); $ cha_height = $ height ;} # reset the actual position of the thumbnail $ dst_x = ($ width-$ cha_width)/2; $ dst_y = ($ height-$ cha_height)/2; imagecopyresampled ($ image_thumb, self: $ image, $ dst_x, $ dst_y, 0, 0, $ cha_width, $ cha_height, self: $ info ['width'], self :: $ info ['height']); # generate a thumbnail self: $ image = $ image_thumb; // # display a thumbnail image // self: show (self :: $ image); # save the thumbnail self: save (self: getNewName (); // destroy the image imagedestroy ($ this-> image_thumb); # return the thumbnail name return self:: getNewName () ;}# watermark generation coordinate private static function setLocal ($ pos) {# determine the pos parameter, specify the coordinates for generating the corresponding watermark # record the watermark image in the config file $ conf ['Mark'] switch ($ pos) {case 1: $ x = 0; $ y = 0; break; case 2: default: $ x = self: $ info ['width']-50; $ y = self: $ info ['height']-50; # It shouldn't be 20. you should change it to the width and height of the watermark image.} return $ local = array ('x' => $ x, 'y' => $ y );} # Add a text watermark public function fontMark ($ content, $ font_url, $ size, $ angle) {# font color $ col = imagecolorallocatealpha (self ::$ image, mt_rand (200,255 ), mt_rand (200,255), mt_rand (200,255), 20); # get the Watermark Output position coordinate $ local = self: setLocal (2); imagettftext (self: $ image, $ size, $ angle, $ local ['x'], $ local ['Y'], $ col, $ font_url, $ content); # display thumbnail image self :: show (self: $ image); # save the text watermark without adding the save path self: save (self: getNewName (); # return the watermark image name return self :: getNewName () ;}# add an image watermark public function imageMark ($ url, $ alpha) {$ info = getimagesize ($ url ); # get image information $ type = image_type_to_extension ($ info [2], false); $ fun = "imagecreatefrom {$ type}"; # get Watermark Output position coordinates $ local = self:: setLocal (2); $ water = $ fun ($ url); # watermark image imagecopymerge (self: $ image, $ water, $ local ['x'], $ local ['Y'], 0, 0, $ info [0], $ info [1], 30); # destroy the image watermark imagedestroy ($ water ); # display thumbnail image self: show (self: $ image); # save the image watermark without adding the save path self: save (self: getNewName ()); # return the watermark image name return self: getNewName ();} # Generate a random image name/*** @ return string to return a new name **/private static function getNewName () {# get a time $ str = time (); # obtain a random string $ string = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOASDFGHJKZXCVBNM1234567890"; for ($ I = 0; $ I <6; $ I ++) {$ str. = $ string [mt_rand (0, strlen ($ string)-1)];} return $ str. self: $ info ['type'] ;}# output the image private static function show () {header ("content-type :". self: $ info ['Mime ']); $ funs = "image ". self: $ info ['type']; $ funs (self: $ image) ;}# save the image to the hard drive private static function save ($ newname) {$ funs = "image ". self: $ info ['type']; $ funs (self: $ image, $ newname. ". ". self: $ info ['type']); # add the directory where the configuration file is generated} # destroy the image public function _ destruct () {imagedestroy (self :: $ image );}}

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