A handy php file upload processing class

//------------------------------------- File Description: File Upload processing class File Author: Jesse Lee //------------------------------------- Class Upload { var $dir; Attachment Storage Physical Directory var $time; Custom File Upload Time var $allow _types; Allow uploading of attachment types var $field; Upload Control Name var $maxsize; Maximum allowable file size, in kilobytes per kb var $thumb _width; Thumbnail width var $thumb _height; Thumbnail height var $watermark _file; Watermark Image Address var $watermark _pos; Watermark Location var $watermark _trans;//Watermark Transparency constructor function $types: Allowed file types to upload, $maxsize: Allowed size, $field: Upload control name, $time: Custom upload Time function upload ($types = ' jpg|png ', $maxsize = 1024x768, $field = ' attach ', $time = ') { $this->allow_types = explode (' | ', $types); $this->maxsize = $maxsize * 1024; $this->field = $field; $this->time = $time? $time: Time (); } Set up and create a directory where files are specifically stored $basedir: Base directory, must be a physical path $filedir: Custom subdirectory, available with parameters {Y}, {m}, {d} function Set_dir ($basedir, $filedir = ") { $dir = $basedir; !is_dir ($dir) && @mkdir ($dir, 0777); if (!empty ($filedir)) { $filedir = str_replace (Array (' {y} ', ' {m} ', ' {y} '), Array (date (' Y ', $this->time), date (' m ', $this->time), date (' d ' , $this->time)), Strtolower ($filedir)); $dirs = explode ('/', $filedir); foreach ($dirs as $d) { !empty ($d) && $dir. = $d. '/'; !is_dir ($dir) && @mkdir ($dir, 0777); } } $this->dir = $dir; } Picture thumbnail settings, not set if no thumbnail is generated $width: Thumbnail width, $height: thumbnail height function Set_thumb ($width = 0, $height = 0) { $this->thumb_width = $width; $this->thumb_height = $height; } Picture watermark settings, if not generated add watermark do not set $file: Watermark image, $pos: Watermark location, $trans: Watermark Transparency function Set_watermark ($file, $pos = 6, $trans = 80) { $this->watermark_file = $file; $this->watermark_pos = $pos; $this->watermark_trans = $trans; } /*---------------------------------------------------------------- Performs a file upload, and returns an array of file information containing the upload success or failure. Where: Name is the file name, upload success is uploaded to the server filename, upload failure is the local file name Dir is the physical path where the attachment is stored on the server and the upload failure does not exist for this value Size is an attachment, upload failure does not exist for this value Flag is the status ID, 1 indicates success, 1 indicates that the file type is not allowed, and 2 indicates that the file size exceeds ----------------------------------------------------------------- */ function Execute () { $files = Array (); Successfully uploaded file information $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 file name extension $filename = $this->time.mt_rand (100,999). '. '. $fileext; Generate file name $filedir = $this->dir; Attachment Actual Storage Directory $filesize = $_files[$field [' Size '] [$key]; File size File type does not allow if (!in_array ($fileext, $this->allow_types)) { $files [$key] [' name '] = $_files[$field] [' name '] [$key]; $files [$key] [' flag '] =-1; Continue } File size exceeded if ($filesize > $this->maxsize) { $files [$key] [' name '] = $_files[$field] [' name '] [$key]; $files [$key] [' flag '] =-2; Continue } $files [$key] [' name '] = $filename; $files [$key] [' dir '] = $filedir; $files [$key] [' size '] = $filesize; Save the upload file and delete the temporary file if (Is_uploaded_file ($_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; Watermark and generate thumbnails for pictures if (In_array ($fileext, array (' jpg ', ' png ', ' gif '))) { if ($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 thumbnails to generate thumbnails with the same extension Php.aspx_file: Source image path, $thumb _file: Thumbnail path function Create_thumb (php.aspx_file, $thumb _file) { $t _width = $this->thumb_width; $t _height = $this->thumb_height; if (!file_exists (Php.aspx_file)) return false; Php.aspx_info = getimagesize (php.aspx_file); Copy source image as thumbnail if source image is less than or equal to thumbnail if (php.aspx_info[0] <= $t _width && php.aspx_info[1] <= $t _height) { if (!copy (Php.aspx_file, $thumb _file)) { return false; } return true; } Calculate thumbnail size proportionally if (php.aspx_info[0]-$t _width > Php.aspx_info[1]-$t _height) { $t _height = ($t _width/php.aspx_info[0]) * php.aspx_info[1]; } else { $t _width = ($t _height/php.aspx_info[1]) * php.aspx_info[0]; } Get file name extension $fileext = $this->fileext (php.aspx_file); Switch ($fileext) { Case ' jpg ': php.aspx_img = Imagecreatefromjpeg (php.aspx_file); Break Case ' PNG ': php.aspx_img = Imagecreatefrompng (php.aspx_file); Break Case ' gif ': php.aspx_img = Imagecreatefromgif (php.aspx_file); Break } Create a true-color thumbnail image $thumb _img = @ImageCreateTrueColor ($t _width, $t _height); The image smoothness of the imagecopyresampled function copy is better, and the first consideration if (function_exists (' imagecopyresampled ')) { @ImageCopyResampled ($thumb _img,php.aspx_img,0,0,0,0, $t _width, $t _height,php.aspx_info[0],php.aspx_info[1]); } else { @ImageCopyResized ($thumb _img,php.aspx_img,0,0,0,0, $t _width, $t _height,php.aspx_info[0],php.aspx_info[1]); } Generate thumbnail images Switch ($fileext) { Case ' jpg ': Imagejpeg ($thumb _img, $thumb _file); Break Case ' gif ': Imagegif ($thumb _img, $thumb _file); Break Case ' PNG ': Imagepng ($thumb _img, $thumb _file); Break } Destroying temporary images @ImageDestroy (PHP.ASPX_IMG); @ImageDestroy ($thumb _img); return true; } Add a watermark to a picture $file: The file to add the watermark to function Create_watermark ($file) { The file does not exist and returns 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 '; Get 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 ']] ($this->watermark_file); Watermark Location Switch ($this->watermark_pos) { Case 1://Top Left $DST _x = 0; $DST _y = 0; Break Case 2://Top Center $DST _x = ($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://Bottom Center $DST _x = ($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 ($temp _wm,true); To set the color blending mode of an image if (function_exists (' Imagesavealpha ')) Imagesavealpha ($temp _wm,true); To save the full alpha channel information Add a watermark to an 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], $wminfo [1]); } Save picture Switch ($fileinfo [' MIME ']) { Case ' Image/jpeg ': @imageJPEG ($temp, $file); Break Case ' image/png ': @imagePNG ($temp, $file); Break Case ' image/gif ': @imageGIF ($temp, $file); Break } Destroy Zero image @imageDestroy ($temp); @imageDestroy ($temp _wm); } } } Get file name extension function Fileext ($filename) { Return Strtolower (substr (STRRCHR ($filename, '. '), 1,10)); } } ?> Copy Code Invocation Example: if ($_get[' action '] = = ' Save ') { $up = new Upload (); $up->set_dir (DirName (__file__). ' /upload/', ' {y}/{m} '); $up->set_thumb (100,80); $up->set_watermark (DirName (__file__). ' /jblog/images/watermark.png ', 6,90); $fs = $up->execute (); Var_dump ($FS); } ?> Test Copy Code

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