PHP batch generation of image thumbnails

PHP batch generation of image thumbnails

This example describes how to generate image thumbnails in batches in PHP. Share it with you for your reference. The details are as follows:

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<? Php // Use PHP to generate batch image thumbnails Function mkdirs ($ dirname, $ mode = 0777) // Create a directory (directory, [mode]) { If (! Is_dir ($ dirname )) { Mkdirs ($ dirname, $ mode); // If the directory does not exist, recursively create Return mkdir ($ dirname, $ mode ); } Return true; } Function savefile ($ filename, $ content = '') // Save the file (file, [content]) { If (function_exists (file_put_contents )) { File_put_contents ($ filename, $ content ); } Else { $ Fp = fopen ($ filename, "wb "); Fwrite ($ fp, $ content ); Fclose ($ fp ); } } Function getsuffix ($ filename) // get the filename suffix { Return end (explode (".", $ filename )); } Function checksuffix ($ filename, $ arr) // whether the parameter is of the allowed type (currently, allowed) { If (! Is_array ($ arr )) { $ Arr = explode (",", str_replace ("", "", $ arr )); } Return in_array ($ filename, $ arr )? 1: 0; } Class image { Var $ src; // Source Address Var $ newsrc; // path of the New Graph (after localization) Var $ allowtype = array (". gif", ". jpg", ". png", ". jpeg"); // allowed image types Var $ regif = 0; // whether to scale down the GIF. If it is 0, it is not processed. Var $ keep = 0; // whether to retain the source file (1 is reserved, 0 is MD5) Var $ over = 0; // whether the existing image can be overwritten. If the value is 0, the existing image cannot be overwritten. Var $ dir; // image source directory Var $ newdir; // processed directory Function _ construct ($ olddir = null, $ newdir = null) { $ This-> dir = $ olddir? $ Olddir: "./images/temp "; $ This-> newdir = $ newdir? $ Newdir: "./images/s "; } Function reNames ($ src) { $ Md5file = substr (md5 ($ src), 10, 10). strrchr ($ src ,"."); // After the MD5 file name (for example, 3293okoe.gif) $ Md5file = $ this-> w. "_". $ this-> h. "_". $ md5file; // Processed file name Return $ this-> newdir. "/". $ md5file; // Save the source image and MD5 file name to the new directory. } Function Mini ($ src, $ w, $ h, $ q = 80) // Generate a thumbnail Mini (image address, width, height, quality) { $ This-> src = $ src; $ This-> w = $ w; $ This-> h = $ h; If (strrchr ($ src, ".") = ". gif" & $ this-> regif = 0) // Whether to process GIF images { Return $ this-> src; } If ($ this-> keep = 0) // whether to retain the source file. By default, the source file is not retained. { $ Newsrc = $ this-> reNames ($ src); // renamed file address } Else // keep original name { $ Src = str_replace ("\", "/", $ src ); $ Newsrc = $ this-> newdir. strrchr ($ src ,"/"); } If (file_exists ($ newsrc) & $ this-> over = 0) // If it already exists, return the address directly. { Return $ newsrc; } If (strstr ($ src, "http ://")&&! Strstr ($ src, $ _ SERVER ['HTTP _ host']) // If it is a network file, save it first { $ Src = $ this-> getimg ($ src ); } $ Arr = getimagesize ($ src); // obtain image attributes $ Width = $ arr [0]; $ Height = $ arr [1]; $ Type = $ arr [2]; Switch ($ type) { Case 1: // 1 = GIF, $ Im = imagecreatefromgif ($ src ); Break; Case 2: // 2 = JPG $ Im = imagecreatefromjpeg ($ src ); Break; Case 3: // 3 = PNG $ Im = imagecreatefrompng ($ src ); Break; Default: Return 0; } // Process the thumbnail $ Nim = imagecreatetruecolor ($ w, $ h ); $ K1 = round ($ h/$ w, 2 ); $ K2 = round ($ height/$ width, 2 ); If ($ k1 <$ k2) { $ Width_a = $ width; $ Height_a = round ($ width * $ k1 ); $ Sw = 0; $ Sh = ($ height-$ height_a)/2; } Else { $ Width_a = $ height/$ k1; $ Height_a = $ height; $ Sw = ($ width-$ width_a)/2; $ Sh = 0; } // Generate an image If (function_exists (imagecopyresampled )) { Imagecopyresampled ($ nim, $ im, 0, $ sw, $ sh, $ w, $ h, $ width_a, $ height_a ); } Else { Imagecopyresized ($ nim, $ im, 0, $ sw, $ sh, $ w, $ h, $ width_a, $ height_a ); } If (! Is_dir ($ this-> newdir )) { Mkdir ($ this-> newdir ); } Switch ($ type) // Save the image { Case 1: $ Rs = imagegif ($ nim, $ newsrc ); Break; Case 2: $ Rs = imagejpeg ($ nim, $ newsrc, $ q ); Break; Case 3: $ Rs = imagepng ($ nim, $ newsrc ); Break; Default: Return 0; } Return $ newsrc; // return the processed path } Function getimg ($ filename) { $ Md5file = $ this-> dir. "/". substr (md5 ($ filename), 10, 10). strrchr ($ filename ,"."); If (file_exists ($ md5file )) { Return $ md5file; } // Get the file and return the new path $ Img = file_get_contents ($ filename ); If ($ img) { If (! Is_dir ($ this-> dir )) { Mkdir ($ this-> dir ); } Savefile ($ md5file, $ img ); Return $ md5file; } } Function reImg ($ src, $ w, $ h, $ q) // Convert the thumbnail (the file name and structure remain unchanged) { $ This-> keep = 1; Return $ this-> Mini ($ src, $ w, $ h, $ q ); // Address generated by return } } $ Image = new image (); Echo $ image-> reImg ("images/zht.jpg", 75, 80 ); Echo "<br/> "; Echo $ image-> reImg ("images/m89w.jpg", 80 ); Echo "<br/> "; Echo $ image-> getimg ("./images/s/zht.jpg "); ?>

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