PHP image upload class; support for watermark-date folder-generating thumbnails; support for multifile Upload

PHP image upload class; support for watermark-date folder-generating thumbnails; support for multifile Upload

You can use {Y} {m} {n} to change the current date. Set_dir (dirname (_ FILE __). '/upload/', '{y}/{m}'); // save path. the options {y} {m} {d} are supported. $ Up-> set_thumb (, 80); // Set the thumbnail size in pixels. $ Up-> set_watermark (dirname (_ FILE _). '/jblog/images/watermark.png', 6, 90); // watermark settings $ Fs = $ up-> execute (); // start execution Var_dump ($ fs); // view the class information for testing } ?> //// View form --------- Test // Supports uploading multiple images */ Class upload { Var $ dir; // The physical directory where the attachment is stored. Var $ time; // custom file upload time Var $ allow_types; // The attachment type that can be uploaded Var $ field; // The name of the upload control. Var $ maxsize; // maximum allowed file size, in KB Var $ thumb_width; // The width of the thumbnail. Var $ thumb_height; // The height of the thumbnail. Var $ watermark_file; // watermark image address Var $ watermark_pos; // Watermark Position Var $ watermark_trans; // watermark transparency // Constructor // $ Types: specifies the file type that can be uploaded. $ maxsize: size allowed. $ field: indicates the name of the upload control. $ time: indicates the custom Upload time. Function upload ($ types = 'jpg | png ', $ maxsize = 1024, $ field = 'Attach', $ time = ''){ $ This-> allow_types = explode ('|', $ types ); $ This-> maxsize = $ maxsize * 1024; $ This-> field = $ field; $ This-> time = $ time? $ Time: time (); } // Set and create a directory for storing files // $ Basedir: Base Directory, which must be a physical path // $ Filedir: custom subdirectory. available parameters: {y}, {m}, and {d} Function set_dir ($ basedir, $ filedir = ''){ $ Dir = $ basedir; ! Is_dir ($ dir) & @ mkdir ($ dir, 0777 ); If (! Empty ($ filedir )){ $ Filedir = str_replace (array ('{y}', '{m}', '{d}'), array (date ('Y ', $ this-> time), date ('M', $ this-> time), date ('D', $ this-> time )), strtolower ($ filedir); // replace the {y} {m} {d} tags with string_replace $ Dirs = explode ('/', $ filedir ); Foreach ($ dirs as $ d ){ ! Empty ($ d) & $ dir. = $ d .'/'; ! Is_dir ($ dir) & @ mkdir ($ dir, 0777 ); } } $ This-> dir = $ dir; } // Set the image thumbnail. If no thumbnail is generated, you do not need to set it. // $ Width: thumbnail width, $ height: Thumbnail height Function set_thumb ($ width = 0, $ height = 0 ){ $ This-> thumb_width = $ width; $ This-> thumb_height = $ height; } // Set the image Watermark. you do not need to set the watermark if no watermark is generated. // $ File: Watermark Image, $ pos: Watermark Position, $ trans: watermark transparency Function set_watermark ($ file, $ pos = 6, $ trans = 80 ){ $ This-> watermark_file = $ file; $ This-> watermark_pos = $ pos; $ This-> watermark_trans = $ trans; } /*---------------------- After the file is uploaded, an array of file information including successful or failed uploads is returned, Where: name is the file name. when the upload is successful, it is the file name uploaded to the server. if the upload fails, it is the local file name. Dir is the physical path where the attachment is stored on the server. this value does not exist when the upload fails. Size indicates the attachment size. this value does not exist when the upload fails. Flag indicates the status, 1 indicates the success,-1 indicates that the file type is not allowed, and-2 indicates that the file size exceeds ----------------------*/ Function execute (){ $ Files = array (); // information of the successfully uploaded File $ Field = $ this-> field; $ Keys = array_keys ($ _ FILES [$ field] ['name']); Foreach ($ keys as $ key ){ If (! $ _ FILES [$ field] ['name'] [$ key]) continue; $ Fileext = $ this-> fileext ($ _ FILES [$ field] ['name'] [$ key]); // get the file extension $ Filename = date ('ymdhis ', $ this-> time). mt_rand (10, 99).'. '. $ fileext; // Generate a file name $ Filedir = $ this-> dir; // actual directory of the attachment $ Filesize = $ _ FILES [$ field] ['size'] [$ key]; // file size // The file type is not allowed. If (! In_array ($ fileext, $ this-> allow_types )){ $ Files [$ key] ['name'] =_ _ FILES [$ field] ['name'] [$ key]; $ Files [$ key] ['flag'] =-1; Continue; } // The file size exceeds If ($ filesize> $ this-> maxsize ){ $ Files [$ key] ['name'] =_ _ FILES [$ field] ['name'] [$ key]; $ Files [$ key] ['name'] = $ filesize; $ Files [$ key] ['flag'] =-2; Continue; } $ Files [$ key] ['name'] = $ filename; $ Files [$ key] ['dir'] = $ filedir; $ Files [$ key] ['size'] = $ filesize; // Save the uploaded file and delete the temporary file If (is_uploaded_file ($ _ FILES [$ field] ['tmp _ name'] [$ key]) { Move_uploaded_file ($ _ FILES [$ field] ['tmp _ name'] [$ key], $ filedir. $ filename ); @ Unlink ($ _ FILES [$ field] ['tmp _ name'] [$ key]); $ Files [$ key] ['flag'] = 1; // Add a watermark to the image and generate a thumbnail. here, only jpg and png images are supported (frames will be lost if gif images are generated) If (in_array ($ fileext, array ('jpg ', 'PNG '))){ If ($ this-> thumb_width ){ If ($ this-> create_thumb ($ filedir. $ filename, $ filedir. 'thumb _ '. $ filename )){ $ Files [$ key] ['thumb'] = 'thumb _ '. $ filename; // Thumbnail file name } } $ This-> create_watermark ($ filedir. $ filename ); } } } Return $ files; } // Create a thumbnail to generate a thumbnail with the same extension // $ Src_file: source image path, $ thumb_file: thumbnail path Function create_thumb ($ src_file, $ thumb_file ){ $ T_width = $ this-> thumb_width; $ T_height = $ this-> thumb_height; If (! File_exists ($ src_file) return false; $ Src_info = getImageSize ($ src_file ); // If the source image is smaller than or equal to the thumbnail, the source image is copied as the thumbnail, saving the operation If ($ src_info [0] <= $ t_width & $ src_info [1] <= $ t_height ){ If (! Copy ($ src_file, $ thumb_file )){ Return false; } Return true; } // Calculate the thumbnail size proportionally If ($ src_info [0]-$ t_width)> ($ src_info [1]-$ t_height )){ $ T_height = ($ t_width/$ src_info [0]) * $ src_info [1]; } Else { $ T_width = ($ t_height/$ src_info [1]) * $ src_info [0]; } // Get the file extension $ Fileext = $ this-> fileext ($ src_file ); Switch ($ fileext ){ Case 'jpg ': $ Src_img = ImageCreateFromJPEG ($ src_file); break; Case 'PNG ': $ Src_img = ImageCreateFromPNG ($ src_file); break; Case 'GIF ': $ Src_img = ImageCreateFromGIF ($ src_file); break; } // Create a real-color thumbnail image $ Thumb_img = @ ImageCreateTrueColor ($ t_width, $ t_height ); // The image copied by the ImageCopyResampled function has good smoothness and is preferred. If (function_exists ('imagecopyresampled ')){ @ ImageCopyResampled ($ thumb_img, $ src_img, 0, 0, 0, $ t_width, $ t_height, $ src_info [0], $ src_info [1]); } Else { @ ImageCopyResized ($ thumb_img, $ src_img, 0, 0, 0, $ t_width, $ t_height, $ src_info [0], $ src_info [1]); } // Generate a thumbnail Switch ($ fileext ){ Case 'jpg ': ImageJPEG ($ thumb_img, $ thumb_file); break; Case 'GIF ': ImageGIF ($ thumb_img, $ thumb_file); break; Case 'PNG ': ImagePNG ($ thumb_img, $ thumb_file); break; } // Destroy temporary images @ ImageDestroy ($ src_img ); @ ImageDestroy ($ thumb_img ); Return true; } // Add a watermark to the image // $ File: the file to add a watermark Function create_watermark ($ file ){ // If the object does not exist, return If (! File_exists ($ this-> watermark_file) |! File_exists ($ file) return; If (! Function_exists ('getimagesize') return; // Check the file types supported by GD $ Gd_allow_types = array (); If (function_exists ('imagecreatefromgif ') $ gd_allow_types ['image/GIF'] = 'imagecreatefromgif '; If (function_exists ('imagecreatefrompng ') $ gd_allow_types ['image/PNG'] = 'imagecreatefrompng '; If (function_exists ('imagecreatefromjpeg ') $ gd_allow_types ['image/jpeg'] = 'imagecreatefromjpeg '; // Obtain the file information $ Fileinfo = getImageSize ($ file ); $ Wminfo = getImageSize ($ this-> watermark_file ); If ($ fileinfo [0] <$ wminfo [0] | $ fileinfo [1] <$ wminfo [1]) return; If (array_key_exists ($ fileinfo ['Mime '], $ gd_allow_types )){ If (array_key_exists ($ wminfo ['Mime '], $ gd_allow_types )){ // Create an image from a file $ Temp = $ gd_allow_types [$ fileinfo ['Mime '] ($ file ); $ Temp_wm = $ gd_allow_types [$ wminfo ['Mime '] ($ this-> watermark_file ); // Watermark Position Switch ($ this-> watermark_pos ){ Case 1: // top left $ Dst_x = 0; $ dst_y = 0; break; Case 2: // center the top $ Dst_x = ($ fileinfo [0]-$ wminfo [0])/2; $ dst_y = 0; break; Case 3: // top right $ Dst_x = $ fileinfo [0]; $ dst_y = 0; break; Case 4: // bottom left $ Dst_x = 0; $ dst_y = $ fileinfo [1]; break; Case 5: // center at the bottom $ Dst_x = ($ fileinfo [0]-$ wminfo [0])/2; $ dst_y = $ fileinfo [1]; break; Case 6: // bottom right $ Dst_x = $ fileinfo [0]-$ wminfo [0]; $ dst_y = $ fileinfo [1]-$ wminfo [1]; break; Default: // random $ Dst_x = mt_rand (0, $ fileinfo [0]-$ wminfo [0]); $ dst_y = mt_rand (0, $ fileinfo [1]-$ wminfo [1]); } If (function_exists ('imagealphablending ') ImageAlphaBlending ($ temp_wm, True); // sets the mixed color mode of the image. If (function_exists ('imagesavealpha ') ImageSaveAlpha ($ temp_wm, True); // Save the complete alpha channel information // Add a watermark to the image If (function_exists ('imagecopymerge ')){ ImageCopyMerge ($ temp, $ temp_wm, $ dst_x, $ dst_y, 0, 0, $ wminfo [0], $ wminfo [1], $ this-> watermark_trans ); } Else { ImageCopyMerge ($ temp, $ temp_wm, $ dst_x, $ dst_y, 0, 0, $ wminfo [0], $ wminfo [1]); } // Save the image Switch ($ fileinfo ['Mime ']) { Case 'image/jpeg ': @ ImageJPEG ($ temp, $ file ); Break; Case 'image/png ': @ ImagePNG ($ temp, $ file ); Break; Case 'image/GIF ': @ ImageGIF ($ temp, $ file ); Break; } // Destroy the zero-time image @ ImageDestroy ($ temp ); @ ImageDestroy ($ temp_wm ); } } } // Obtain the file extension Function fileext ($ filename ){ Return strtolower (substr (strrchr ($ filename, '.'), 1, 10 )); } } ?>

Image upload, PHP

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