PHP full-featured no-deformation image cropping operation class and usage example,

PHP full-featured no-deformation image cropping operation class and usage example,

This article describes the full-featured PHP cropping operations and usage without deformation. We will share this with you for your reference. The details are as follows:

If you want to crop an image or generate a thumbnail, there is basically no problem. All the required functions are in it and there is no deformation.

Here we are divided into four modes:

1. Crop any image to a specified size. If it exceeds the specified size, crop the image in the play and maximize the scaling. If it is not enough, stretch the image,
2. If the image is not scaled out or scaled out, the image is added to the White List. The png transparency can be used to remove the image.
3. retain all image information. No cropping, only scaling, insufficient padding.
4. retain all image information. No cropping, only scaling, insufficient do not fill in the white, the generated image is the actual effective pixel size, for example, if an image is 600X600 and you want to generate 120X100, the actual valid pixel after scaling is 100X100. Therefore, only X images are generated, in the third mode, the size of X is generated, and the value is white.

The Code is as follows (here the code is formatted using the online tool http://tools.jb51.net/code/jb51_php_format ):

<? Php/*** Author: smallchicken * mode 1: Force crop. The generated image must be scaled in strict accordance with the requirements. The cropped image is always full * mode 2: similar to 1, if the image is not zoomed in, it will generate a whitelist. You can use png to remove the image. * Mode 3: only scaling, no cropping, retain all image information, will generate a fill white, * mode 4: only scaling, no cropping, keep all image information, the size of the generated image is the actual size of the final scaled image's valid information. No padding is generated. * The default padding is white. To make the padding transparent, use SaveAlpha () method to replace the SaveImage () method ** call method: ** $ ic = new imagecrop('old.jpg', 'aftercrop.jpg '); * $ ic-> Crop (, 80, 2 ); * $ ic-> SaveImage (); * // $ ic-> SaveAlpha (); convert the padding to transparent pixels to save * $ ic-> destory (); * **/class ImageCrop {var $ sImage; var $ dImage; var $ src_file; var $ dst_file; var $ src_width; var $ src_height; Var $ src_ext; var $ src_type; function ImageCrop ($ src_file, $ dst_file = '') {$ this-> src_file = $ src_file; $ this-> dst_file = $ dst_file; $ this-> LoadImage ();} function SetSrcFile ($ src_file) {$ this-> src_file = $ src_file;} function SetDstFile ($ dst_file) {$ this-> dst_file = $ dst_file;} function LoadImage () {list ($ this-> src_width, $ this-> src_height, $ this-> src_type) = getimagesize ($ this-> src_file); switch ($ th Is-> src_type) {case IMAGETYPE_JPEG: $ this-> sImage = imagecreatefromjpeg ($ this-> src_file); $ this-> ext = 'jpg '; break; case IMAGETYPE_PNG: $ this-> sImage = imagecreatefrompng ($ this-> src_file); $ this-> ext = 'png '; break; case IMAGETYPE_GIF: $ this-> sImage = imagecreatefromgif ($ this-> src_file); $ this-> ext = 'gif'; break; default: exit ();}} function SaveImage ($ fileName = '') {$ this-> dst_file = $ fileName? $ FileName: $ this-> dst_file; switch ($ this-> src_type) {case IMAGETYPE_JPEG: imagejpeg ($ this-> dImage, $ this-> dst_file, 100); break; case IMAGETYPE_PNG: imagepng ($ this-> dImage, $ this-> dst_file); break; case IMAGETYPE_GIF: imagegif ($ this-> dImage, $ this-> dst_file); break; default: break;} function OutImage () {switch ($ this-> src_type) {case IMAGETYPE_JPEG: header ('content-type: image/jpeg '); imagej Peg ($ this-> dImage); break; case IMAGETYPE_PNG: header ('content-type: image/png '); imagepng ($ this-> dImage); break; case IMAGETYPE_GIF: header ('content-type: image/gif'); imagegif ($ this-> dImage); break; default: break ;}} function SaveAlpha ($ fileName = '') {$ this-> dst_file = $ fileName? $ FileName. '.png ': $ this-> dst_file .'.png'; imagesavealpha ($ this-> dImage, true); imagepng ($ this-> dImage, $ this-> dst_file );} function OutAlpha () {imagesavealpha ($ this-> dImage, true); header ('content-type: image/png '); imagepng ($ this-> dImage );} function destory () {imagedestroy ($ this-> sImage); imagedestroy ($ this-> dImage);} function Crop ($ dst_width, $ dst_height, $ mode = 1, $ dst_file = '') {if ($ dst_fil E) $ this-> dst_file = $ dst_file; $ this-> dImage = imagecreatetruecolor ($ dst_width, $ dst_height); $ bg = imagecolorallocatealpha ($ this-> dImage, 255,255,255,127 ); imagefill ($ this-> dImage, 0, 0, $ bg); imagecolortransparent ($ this-> dImage, $ bg ); $ ratio_w = 1.0 * $ dst_width/$ this-> src_width; $ ratio_h = 1.0 * $ dst_height/$ this-> src_height; $ ratio = 1.0; switch ($ mode) {case 1: // always crop if ($ ratio_w <1 & $ Ratio_h <1) | ($ ratio_w> 1 & $ ratio_h> 1) {$ ratio = $ ratio_w <$ ratio_h? $ Ratio_h: $ ratio_w; $ tmp_w = (int) ($ dst_width/$ ratio); $ tmp_h = (int) ($ dst_height/$ ratio ); $ tmp_img = imagecreatetruecolor ($ tmp_w, $ tmp_h); $ src_x = (int) ($ this-> src_width-$ tmp_w)/2); $ src_y = (int) ($ this-> src_height-$ tmp_h)/2); imagecopy ($ tmp_img, $ this-> sImage, 0, 0, $ src_x, $ src_y, $ tmp_w, $ tmp_h); imagecopyresampled ($ this-> dImage, $ tmp_img, 0, 0, 0, $ dst_width, $ dst_height, $ tmp_w, $ tmp_h); ima Gedestroy ($ tmp_img);} else {$ ratio = $ ratio_w <$ ratio_h? $ Ratio_h: $ ratio_w; $ tmp_w = (int) ($ this-> src_width * $ ratio); $ tmp_h = (int) ($ this-> src_height * $ ratio ); $ tmp_img = values ($ tmp_w, $ tmp_h); imagecopyresampled ($ tmp_img, $ this-> sImage, $ tmp_w, $ tmp_h, $ this-> src_width, $ this-> src_height); $ src_x = (int) ($ tmp_w-$ dst_width)/2; $ src_y = (int) ($ tmp_h-$ dst_height)/2; imagecopy ($ this-> dImage, $ tmp_img, 0, $ src_x, $ src_y, $ dst_w Idth, $ dst_height); imagedestroy ($ tmp_img);} break; case 2: // only small if ($ ratio_w <1 & $ ratio_h <1) {$ ratio = $ ratio_w <$ ratio_h? $ Ratio_h: $ ratio_w; $ tmp_w = (int) ($ dst_width/$ ratio); $ tmp_h = (int) ($ dst_height/$ ratio ); $ tmp_img = imagecreatetruecolor ($ tmp_w, $ tmp_h); $ src_x = (int) ($ this-> src_width-$ tmp_w)/2; $ src_y = (int) ($ this-> src_height-$ tmp_h)/2; imagecopy ($ tmp_img, $ this-> sImage, 0, $ src_x, $ src_y, $ tmp_w, $ tmp_h ); imagecopyresampled ($ this-> dImage, $ tmp_img, 0, 0, 0, $ dst_width, $ dst_height, $ tmp_w, $ tmp_h); imagede Stroy ($ tmp_img);} elseif ($ ratio_w> 1 & $ ratio_h> 1) {$ dst_x = (int) abs ($ dst_width-$ this-> src_width) /2; $ dst_y = (int) abs ($ dst_height-$ this-> src_height)/2; imagecopy ($ this-> dImage, $ this-> sImage, $ dst_x, $ dst_y, 0, 0, $ this-> src_width, $ this-> src_height);} else {$ src_x = 0; $ dst_x = 0; $ src_y = 0; $ dst_y = 0; if ($ dst_width-$ this-> src_width) <0) {$ src_x = (int) ($ this-> src_width-$ dst_width )/2; $ dst_x = 0;} else {$ src_x = 0; $ dst_x = (int) ($ dst_width-$ this-> src_width)/2 ;} if ($ dst_height-$ this-> src_height) <0) {$ src_y = (int) ($ this-> src_height-$ dst_height)/2; $ dst_y = 0;} else {$ src_y = 0; $ dst_y = (int) ($ dst_height-$ this-> src_height)/2 ;} imagecopy ($ this-> dImage, $ this-> sImage, $ dst_x, $ dst_y, $ src_x, $ src_y, $ this-> src_width, $ this-> src_height );} break; case 3: // keep All image size and create need size if ($ ratio_w> 1 & $ ratio_h> 1) {$ dst_x = (int) (abs ($ dst_width-$ this-> src_width) /2); $ dst_y = (int) (abs ($ dst_height-$ this-> src_height)/2); imagecopy ($ this-> dImage, $ this-> sImage, $ dst_x, $ dst_y, 0, 0, $ this-> src_width, $ this-> src_height);} else {$ ratio = $ ratio_w> $ ratio_h? $ Ratio_h: $ ratio_w; $ tmp_w = (int) ($ this-> src_width * $ ratio); $ tmp_h = (int) ($ this-> src_height * $ ratio ); $ tmp_img = values ($ tmp_w, $ tmp_h); imagecopyresampled ($ tmp_img, $ this-> sImage, $ tmp_w, $ tmp_h, $ this-> src_width, $ this-> src_height); $ dst_x = (int) (abs ($ tmp_w-$ dst_width)/2); $ dst_y = (int) (abs ($ tmp_h-$ dst_height)/2); imagecopy ($ this-> dImage, $ tmp_img, $ dst_x, $ dst_y, 0, 0, $ Tmp_w, $ tmp_h); imagedestroy ($ tmp_img);} break; case 4: // keep all image but create actually size if ($ ratio_w> 1 & $ ratio_h> 1) {$ this-> dImage = imagecreatetruecolor ($ this-> src_width, $ this-> src_height); imagecopy ($ this-> dImage, $ this-> sImage, 0, 0, 0, $ this-> src_width, $ this-> src_height);} else {$ ratio = $ ratio_w> $ ratio_h? $ Ratio_h: $ ratio_w; $ tmp_w = (int) ($ this-> src_width * $ ratio); $ tmp_h = (int) ($ this-> src_height * $ ratio ); $ this-> dImage = imagecreatetruecolor ($ tmp_w, $ tmp_h); imagecopyresampled ($ this-> dImage, $ this-> sImage, 0, 0, 0, $ tmp_w, $ tmp_h, $ this-> src_width, $ this-> src_height);} break;} // end Crop}?>

PS: Here are some useful image processing tools for your reference:

Online image conversion BASE64 tool:
Http://tools.jb51.net/transcoding/img2base64

ICO icon generation tool:
Http://tools.jb51.net/aideddesign/ico_img

Online Email icon creation tools:
Http://tools.jb51.net/email/emaillogo

Online image format conversion (jpg/bmp/gif/png) tool:
Http://tools.jb51.net/aideddesign/picext