Php saves images of different specifications _ PHP Tutorial-php Tutorial

Php saves images of different specifications. 1. image processing class. imagecls. php? Php ** image processing class * classimagecls {*** file information * var $ filearray (); *** save directory * var $ dir; * ** error code * var $ error_c 1. image processing class. imagecls. php

 $ This-> max_size) | (-1 = $ this-> max_size );} /*** process the uploaded file ** @ param array $ file the uploaded file * @ param string $ dir saved directory * @ return bool */function init ($ file, $ dir = 'temp ') {if (! Is_array ($ file) | empty ($ file) |! $ This-> isUploadFile ($ file ['tmp _ name']) | trim ($ file ['name']) = ''| $ file ['size'] = 0) {$ this-> file = array (); $ this-> error_code =-1; return false;} else {$ file ['size'] = intval ($ file ['size']); $ file ['name'] = trim ($ file ['name']); $ file ['thumb'] = ''; $ file ['text'] = $ this-> fileExt ($ file ['name']); $ file ['name'] = htmlspecialchars ($ file ['name'], ENT_QUOTES ); $ file ['is _ image'] = $ this-> isImageExt ($ file ['ex T']); $ file ['File _ dir'] = $ this-> getTargetDir ($ dir ); $ file ['prefix'] = md5 (microtime (true )). rand (10, 99); $ file ['target'] = ". /public /". $ file ['File _ dir']. '/'.20.file='prefix'0000.'.jpg'; // relative to $ file ['Local _ target'] = APP_ROOT_PATH. "public /". $ file ['File _ dir']. '/'.{file}'prefix'{.'.jpg'; // physical $ this-> file = & $ file; $ this-> error_code = 0; return true ;}} /*** save the file * @ return bool */function save () {if (empty ($ this-> file) | Empty ($ this-> file ['tmp _ name']) $ this-> error_code =-101; elseif (! $ This-> checkSize ($ this-> file ['size']) $ this-> error_code =-105; elseif (! $ This-> file ['is _ image']) $ this-> error_code =-102; elseif (! $ This-> saveFile ($ this-> file ['tmp _ name'], $ this-> file ['Local _ target']) $ this-> error_code =-103; elseif ($ this-> file ['is _ image'] & (! $ This-> file ['image _ info'] = $ this-> getImageInfo ($ this-> file ['Local _ target'], true ))) {$ this-> error_code =-104; @ unlink ($ this-> file ['Local _ target']);} else {$ this-> error_code = 0; return true;} return false;}/*** get error code * @ return number */function error () {return $ this-> error_code ;} /*** get file extension * @ return string */function fileExt ($ file_name) {return addslashes (strtolower (substr (strrchr ($ file_name ,'. '), 1, 10);}/*** determine whether the file is an image based on the extension * @ param string $ ext extension * @ return bool */function isImageExt ($ ext) {static $ img_ext = array ('jpg ', 'jpeg', 'PNG ', 'bmp', 'GIF', 'giff '); return in_array ($ ext, $ img_ext )? 1: 0;}/*** obtain image information * @ param string $ target file path * @ return mixed */function getImageInfo ($ target) {$ ext = es_imagecls :: fileExt ($ target); $ is_image = es_imagecls: isImageExt ($ ext); if (! $ Is_image) return false; elseif (! Is_readable ($ target) return false; elseif ($ image_info = @ getimagesize ($ target) {list ($ width, $ height, $ type) =! Empty ($ image_info )? $ Image_info: array ('','', ''); $ size = $ width * $ height; if ($ is_image &&! In_array ($ type, array (, 13) return false; $ image_info ['type'] = strtolower (substr (image_type_to_extension ($ image_info [2]), 1); return $ image_info;} elsereturn false ;} /*** obtain whether to upload a file. * @ param string $ source file path * @ return bool */function isUploadFile ($ source) {return $ source & ($ source! = 'None') & (is_uploaded_file ($ source) | is_uploaded_file (str_replace ('','', $ source )));} /*** get the saved path * @ param string $ dir the specified directory * @ return string */function getTargetDir ($ dir) {if (! Is_dir (APP_ROOT_PATH. "public /". $ dir) {@ mkdir (APP_ROOT_PATH. "public /". $ dir); @ chmod (APP_ROOT_PATH. "public /". $ dir, 0777);} return $ dir ;} /*** save the file * @ param string $ source file path * @ param string $ target directory file path * @ return bool */private function saveFile ($ source, $ target) {if (! Es_imagecls: isUploadFile ($ source) $ succeed = false; elseif (@ copy ($ source, $ target) $ succeed = true; elseif (function_exists ('move _ uploaded_file ') & @ move_uploaded_file ($ source, $ target) $ succeed = true; elseif (@ is_readable ($ source) & (@ $ fp_s = fopen ($ source, 'RB') & (@ $ fp_t = fopen ($ target, 'wb') {while (! Feof ($ fp_s) {$ s = @ fread ($ fp_s, 1024*512); @ fwrite ($ fp_t, $ s);} fclose ($ fp_s ); fclose ($ fp_t); $ succeed = true;} if ($ succeed) {$ this-> error_code = 0; @ chmod ($ target, 0644 ); @ unlink ($ source);} else {$ this-> error_code = 0;} return $ succeed;} public function thumb ($ image, $ maxWidth = 200, $ maxHeight = 50, $ gen = 0, $ interlace = true, $ filepath = '', $ is_preview = true) {$ info = es_imagecls: getImageInfo ($ image ); if ($ info! = False) {$ srcWidth = $ info [0]; $ srcHeight = $ info [1]; $ type = $ info ['type']; $ interlace = $ interlace? 1:0; unset ($ info); if ($ maxWidth> 0 & $ maxHeight> 0) $ scale = min ($ maxWidth/$ srcWidth, $ maxHeight/$ srcHeight ); // calculate the scale of elseif ($ maxWidth = 0) $ scale = $ maxHeight/$ srcHeight; elseif ($ maxHeight = 0) $ scale = $ maxWidth/$ srcWidth; $ paths = pathinfo ($ image); $ paths ['filename'] = trim (strtolower ($ paths ['basename']), ". ". strtolower ($ paths ['extension']); $ basefilename = explode ("_", $ paths ['filename']); $ basef Ilename = $ basefilename [0]; if (empty ($ filepath) {if ($ is_preview) $ thumbname = $ paths ['dirname']. '/'. $ basefilename. '_'.w.maxwidth.'x'.w.maxheight.'.jpg '; else $ thumbname = $ paths ['dirname']. '/'. $ basefilename. 'o_'.w.maxwidth.'x'.w.maxheight.'.jpg ';} else $ thumbname = $ filepath; $ thumburl = str_replace (APP_ROOT_PATH ,'. /', $ thumbname); if ($ scale> = 1) {// no longer scale out when the source image size exceeds $ width = $ srcWidth; $ height = $ srcHeight; if (! $ Is_preview) {// write the source image file_put_contents ($ thumbname, file_get_contents ($ image) in non-preview mode; // write the return array ('URL' => $ thumburl, 'Path' => $ thumbname);} else {// Thumbnail size $ width = (int) ($ srcWidth * $ scale); $ height = (int) ($ srcHeight * $ scale);} if ($ gen = 1) {$ width = $ maxWidth; $ height = $ maxHeight ;} // load the source image $ createFun = 'imagecreatefrom '. ($ type = 'jpg '? 'Jpeg ': $ type); if (! Function_exists ($ createFun) $ createFun = 'imagecreatefromjpeg '; $ srcImg = $ createFun ($ image); // Create a thumbnail if ($ type! = 'GIF' & function_exists ('imagecreatetruecolor') $ thumbImg = imagecreatetruecolor ($ width, $ height); else $ thumbImg = imagecreate ($ width, $ height ); $ x = 0; $ y = 0; if ($ gen = 1 & $ maxWidth> 0 & $ maxHeight> 0) {$ resize_ratio = $ maxWidth/$ maxHeight; $ src_ratio = $ srcWidth/$ srcHeight; if ($ src_ratio >=$ resize_ratio) {$ x = ($ srcWidth-($ resize_ratio * $ srcHeight)/2; $ width = ($ height * $ srcWidth)/$ s RcHeight;} else {$ y = ($ srcHeight-(1/$ resize_ratio) * $ srcWidth)/2; $ height = ($ width * $ srcHeight) /$ srcWidth ;}// copy the image if (function_exists ("imagecopyresampled") imagecopyresampled ($ thumbImg, $ srcImg, 0, 0, $ x, $ y, $ width, $ width, $ height, $ srcWidth, $ srcHeight); else imagecopyresized ($ thumbImg, $ srcImg, 0, 0, $ x, $ y, $ width, $ height, $ srcWidth, $ srcHeight); if ('GIF' = $ type | 'PNG '= $ type) {$ back Ground_color = imagecolorallocate ($ thumbImg, 0,255, 0); // assign a green imagecolortransparent ($ thumbImg, $ background_color); // set the color to transparent, if this line is commented out, a green image will be output.} // you can set a line scan for the jpeg image if ('jpg '= $ type | 'jpeg' = $ type) imageinterlace ($ thumbImg, $ interlace); // generate an image imagejpeg ($ thumbImg, $ thumbname, 100); imagedestroy ($ thumbImg); imagedestroy ($ srcImg ); return array ('URL' => $ thumburl, 'path' => $ thumbname);} return false;} public fun Ction make_thumb ($ srcImg, $ srcWidth, $ srcHeight, $ type, $ maxWidth = 200, $ maxHeight = 50, $ gen = 0) {$ interlace = $ interlace? 1:0; if ($ maxWidth> 0 & $ maxHeight> 0) $ scale = min ($ maxWidth/$ srcWidth, $ maxHeight/$ srcHeight ); // calculate the scale of elseif ($ maxWidth = 0) $ scale = $ maxHeight/$ srcHeight; elseif ($ maxHeight = 0) $ scale = $ maxWidth/$ srcWidth; if ($ scale> = 1) {// no longer scale out when the source image size exceeds $ width = $ srcWidth; $ height = $ srcHeight ;} else {// Thumbnail size $ width = (int) ($ srcWidth * $ scale); $ height = (int) ($ srcHeight * $ scale );} if ($ gen = 1) {$ width = $ maxW Idth; $ height = $ maxHeight;} // Create a thumbnail if ($ type! = 'Gif '& function_exists ('imagecreatetruecolor') $ thumbImg = imagecreatetruecolor ($ width, $ height); else $ thumbImg = imagecreatetruecolor ($ width, height $ ); $ x = 0; $ y = 0; if ($ gen = 1 & $ maxWidth> 0 & $ maxHeight> 0) {$ resize_ratio = $ maxWidth/$ maxHeight; $ src_ratio = $ srcWidth/$ srcHeight; if ($ src_ratio >=$ resize_ratio) {$ x = ($ srcWidth-($ resize_ratio * $ srcHeight)/2; $ width = ($ height * $ srcWi Dth)/$ srcHeight;} else {$ y = ($ srcHeight-(1/$ resize_ratio) * $ srcWidth)/2; $ height = ($ width * $ srcHeight)/$ srcWidth;} // copy the image if (function_exists ("imagecopyresampled") imagecopyresampled ($ thumbImg, $ srcImg, 0, 0, $ x, $ y, $ width, $ height, $ srcWidth, $ srcHeight); else imagecopyresized ($ thumbImg, $ srcImg, 0, 0, $ x, $ y, $ width, $ height, $ srcWidth, $ srcHeight); if ('GIF' = $ type | 'PNG '= $ type) {$ Background_color = imagecolorallocate ($ thumbImg, 255,255,255); // assign a green imagecolortransparent ($ thumbImg, $ background_color); // set the color to transparent, if this line is commented out, a green image will be output.} // you can set a line scan for the jpeg image if ('jpg '= $ type | 'jpeg' = $ type) imageinterlace ($ thumbImg, $ interlace); return $ thumbImg;} public function water ($ source, $ water, $ alpha = 80, $ position = "0 ") {// check whether the object exists if (! File_exists ($ source) |! File_exists ($ water) return false; // image information $ sInfo = es_imagecls: getImageInfo ($ source); $ wInfo = es_imagecls: getImageInfo ($ water ); // If the image is smaller than the watermark image, if ($ sInfo ["0"] <$ wInfo ["0"] | $ sInfo ['1'] <$ wInfo ['1']) return false; if (is_animated_gif ($ source) {require_once APP_ROOT_PATH. "system/utils/gif_encoder.php"; require_once APP_ROOT_PATH. "system/utils/gif_reader.php"; $ gif = new GIFReader (); $ gif-> loa D ($ source); foreach ($ gif-> IMGS ['frames '] as $ k => $ img) {$ im = imagecreatefromstring ($ gif-> getgif ($ k); // add a watermark to im $ sImage = $ im; $ wCreateFun = "imagecreatefrom ". $ wInfo ['type']; if (! Function_exists ($ wCreateFun) $ wCreateFun = 'imagecreatefromjpeg '; $ wImage = $ wCreateFun ($ water); // sets the image blending mode imagealphablending ($ wImage, true ); switch (intval ($ position) {case 0: break; // upper left case 1: $ posY = 0; $ posX = 0; // Generate a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // upper right case 2: $ posY = 0; $ posX = $ sInfo [0]-$ wInfo [0]; // Generate a hybrid image imagecopymerge ($ sImage, $ wImag E, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // Lower left case 3: $ posY = $ sInfo [1]-$ wInfo [1]; $ posX = 0; // Generate a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // Lower right case 4: $ posY = $ sInfo [1]-$ wInfo [1]; $ posX = $ sInfo [0]-$ wInfo [0]; // Generate a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // center case 5: $ posY = $ sInfo [1]/2- $ WInfo [1]/2; $ posX = $ sInfo [0]/2-$ wInfo [0]/2; // generates a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break;} // end im watermark ob_start (); imagegif ($ sImage); $ content = ob_get_contents (); ob_end_clean (); $ frames [] = $ content; $ framed [] = $ img ['framedelay'];} $ gif_maker = new GIFEncoder ($ frames, $ framed, 0, 2, 0, 0, 0, "bin" // The binary url is the address ); $ image_rs = $ gif_maker-> Get Animation (); // if the file name is not given, the default value is the original image name @ unlink ($ source); // save the image file_put_contents ($ source, $ image_rs ); return true;} // create an image $ sCreateFun = "imagecreatefrom ". $ sInfo ['type']; if (! Function_exists ($ sCreateFun) $ sCreateFun = 'imagecreatefromjpeg '; $ sImage = $ sCreateFun ($ source); $ wCreateFun = "imagecreatefrom ". $ wInfo ['type']; if (! Function_exists ($ wCreateFun) $ wCreateFun = 'imagecreatefromjpeg '; $ wImage = $ wCreateFun ($ water); // sets the image blending mode imagealphablending ($ wImage, true ); switch (intval ($ position) {case 0: break; // upper left case 1: $ posY = 0; $ posX = 0; // Generate a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // upper right case 2: $ posY = 0; $ posX = $ sInfo [0]-$ wInfo [0]; // Generate a hybrid image imagecopymerge ($ sImage, $ wImag E, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // Lower left case 3: $ posY = $ sInfo [1]-$ wInfo [1]; $ posX = 0; // Generate a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // Lower right case 4: $ posY = $ sInfo [1]-$ wInfo [1]; $ posX = $ sInfo [0]-$ wInfo [0]; // Generate a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break; // center case 5: $ posY = $ sInfo [1]/2- $ WInfo [1]/2; $ posX = $ sInfo [0]/2-$ wInfo [0]/2; // generates a hybrid image imagecopymerge ($ sImage, $ wImage, $ posX, $ posY, 0, 0, $ wInfo [0], $ wInfo [1], $ alpha); break;} // if no save file name is provided, the default value is the original image name @ unlink ($ source); // save the image imagejpeg ($ sImage, $ source, 100); imagedestroy ($ sImage) ;}} if (! Function_exists ('image _ type_to_extension ') {function image_type_to_extension ($ imagetype) {if (empty ($ imagetype) return false; switch ($ imagetype) {case IMAGETYPE_GIF: return '.gif '; case IMAGETYPE_JPEG: return '.jpeg'; case IMAGETYPE_PNG: return '.png '; case IMAGETYPE_SWF: return '.swf'; case IMAGETYPE_PSD: return '. psd '; case IMAGETYPE_BMP: return '.bmp'; case imagetype_ii _ii: return '. tiff '; case IM Agetype_0000_mm: return '. tiff '; case IMAGETYPE_JPC: return '. jpc'; case IMAGETYPE_JP2: return '. jp2 '; case IMAGETYPE_JPX: return '. jpf '; case IMAGETYPE_JB2: return '. jb2 '; case IMAGETYPE_SWC: return '. swc '; case IMAGETYPE_IFF: return '. aiff '; case IMAGETYPE_WBMP: return '. wbmp '; case IMAGETYPE_XBM: return '. xbm '; default: return false ;}}?>
2. get_spec_img () calls the image class, saves images of different specifications and returns the image connection using the following method.
// Obtain the image address of the corresponding Specification // gen = 0: proportional scaling without cropping. if the height is 0, proportional width scaling is ensured. gen = 1: The length and width are guaranteed, crop function get_spec_image ($ img_path, $ width = 0, $ height = 0, $ gen = 0, $ is_preview = true) {if ($ width = 0) $ new_path = $ img_path; else {$ img_name = substr ($ img_path, 0,-4); $ img_ext = substr ($ img_path,-3); if ($ is_preview) $ new_path = $ img_name. "_". $ width. "x ". $ height. ". jpg "; else $ new_path = $ img_name. "o _". $ width. "x ". $ height. ". jpg "; if (! File_exists ($ new_path) {require_once "imagecls. php "; $ imagec = new imagecls (); $ thumb = $ imagec-> thumb ($ img_path, $ width, $ height, $ gen, true ,"", $ is_preview); if (app_conf ("PUBLIC_DOMAIN_ROOT ")! = '') {$ Paths = pathinfo ($ new_path); $ path = str_replace (". /"," ", $ paths ['dirname']); $ filename = $ paths ['basename']; $ pathwithoupublic = str_replace (" public /","", $ path); $ file_data = @ file_get_contents ($ path. $ file); $ img = @ imagecreatefromstring ($ file_data); if ($ img! = False) {$ save_path = "public/". $ path; if (! Is_dir ($ save_path) {@ mk_dir ($ save_path) ;}@ file_put_contents ($ save_path. $ name, $ file_data) ;}}} return $ new_path ;}
3. usage:
// Im: save the shop image as three types: Small Image: 48x48, medium 20x120, 00x200 $ small_url = get_spec_image ($ data ['image'], 120,120, 0); $ middle_url = get_spec_image ($ data ['image'], 0 ); $ big_url = get_spec_image ($ data ['image'], 200,200, 0 );

Why? Php/** image processing class */class imagecls {/*** file information */var $ file = array (); /*** save directory */var $ dir = '';/*** error code */var $ error_c...