PHP image upload class, support watermark-date folder-Generate thumbnails, support multi-file upload

You can use {Y}{m}{n} to become the current date Set_dir (DirName (__file__). ' /upload/', ' {y}/{m} '); Save path, support {y}{m}{d} these several options $up->set_thumb (100,80); Thumbnail size setting. Units in pixels $up->set_watermark (DirName (__file__). ' /jblog/images/watermark.png ', 6,90); Watermark Settings $fs = $up->execute (); Start execution Var_dump ($FS); Scenarios for testing the view class } ?> View Sheet--------- Test Support Multiple image uploads */ 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} ', ' {d} '), Array (date (' Y ', $this->time), date (' m ', $this->time), date (' d ' , $this->time)), Strtolower ($filedir));//replace {y} {m} {D} with String_replace $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 = Date (' Ymdhis ', $this->time). Mt_rand (10,99). '. '. $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] [' name '] = $filesize; $files [$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 images and generate thumbnails, where the demo only supports JPG and PNG (GIF generated words will be out of frame) 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 thumbnails to generate thumbnails 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); Copy the source image as a thumbnail if the source image is less than or equal to the thumbnail, eliminating the action if ($src _info[0] <= $t _width && $src _info[1] <= $t _height) { if (!copy ($src _file, $thumb _file)) { return false; } return true; } Calculate thumbnail size proportionally if (($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 file name 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 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, $src _img,0,0,0,0, $t _width, $t _height, $src _info[0], $src _info[1]); } else { @ImageCopyResized ($thumb _img, $src _img,0,0,0,0, $t _width, $t _height, $src _info[0], $src _info[1]); } Generate thumbnail images Switch ($fileext) { Case ' jpg ': Imagejpeg ($thumb _img, $thumb _file); Break Case ' gif ': Imagegif ($thumb _img, $thumb _file); Break Case ' PNG ': Imagepng ($thumb _img, $thumb _file); Break } Destroying temporary images @ImageDestroy ($src _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

Image upload, PHP This topic was moved by Beckham on 2015-11-18 08:23

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