PHP generates a thumbnail class

PHP generates a thumbnail class

<? PHP class ThumbnailException extended exception {public function _ construct ($ Message = null, then $ Code = 0) {Parent: _ construct ($ Message, $ Code ); in error_log ('error '. $ This-> GETFILE (). 'Row '. $ This-> getLine (). "Error:" GetMessage ();} class ThumbnailFileException: extended ThumbnailException {} class ThumbailNotSupportedException extended ThumbnailException {} class thumbnail {private $ maxWidth; private $ maxHeight; // scale down the maximum private size of the image; // scale down the private size proportionally; // how to deal with pictures that are too small (whether to zoom in or not to fill in the thumbnail) private type; // the image type that can be processed private imgLoaders // the function name for saving the loaded image private imgCreators; private source; // source image Private $ sourceWidth; private sourceHeight USD; private $ sourceMine; private thumb; // Thumbnail Image private $ thumbWi Dth; private thumbHeight USD; /*************************************** **************************************** * ******************* function name: __construct constructor functions: *********************************** * *******************************/public function _ construct ($ maxWidth, maxHeight USD, scale = true, expansion = true) {$-> maxHeight = $ maxHeight; $-> maxWidth = $ maxWidth;-> scale = $ scale; -> Expansion = $ expansion;-> Type = array ("image/jpeg Parts ', 'image/PNG, image/GIF '); // define the type that can be processed-> imgLoaders = array (// define the corresponding loading function for each type 'image/jpeg file' => 'imagecreatefromjpeg '"image/PNG' => imagecreatefrompng "', "image/GIF" => imagecreatefromgif "',); -> imgCreators = array (// define the corresponding processing function for each type 'image/jpeg file' => 'imagejpeg '"image/PNG' => imagepng"', "image/GIF" => imagegif "',);} /*************************************** ************************************* * ********************* Function name: LoadFile function: load local files ************************************* * *****************************/public function LoadFile ($ image) {($ darken = @ and getimagesize (image) // Obtain the image information and judge {a new ThumbnailFileException is thrown ('the image cannot be found: $ image) // throw an error} (in_array ($ darken ['Mime '], $ this-> "type ")) {$ loader =$-> imgLoaders [$ darken ['Mime '];-> source = $ loader (Image ); // store the loaded image --- imagecratefrom *-> sourceWidth = $ darken [0];-> source Height = $ darken [1]; $-> sourceMine = $ darken ['Mime ']; $-> initThumb () // call the function to generate a thumbnail to return the truth ;} other {throws the new ThumbailNotSupportedException ("MIME type of the image. $ Darken ['Mime '. 'Do not ORD '); // throw an error }}/********************************* **************************************** * ************************ function name loaddata function: load files in the database *********************************** * image, $ mime) {if (in_array ($ mime, $ this-> "type") {if ($-> source = imagecreatefromstring (image )) // load the image from the database {-> sourceWidth = imagesx ($ this-> source); // Obtain the width of the source image-> sourceHe Ight = imagesy ($ this-> "source"); // Obtain the height of the source image-> sourceMine = $ mime; // Obtain the source image type $-> initThumb () // call the function to generate a thumbnail to return the truth;} Other {throws the new ThumbnailFileException ("the image cannot be loaded from the string '); // throw error message} others {throw new ThumbailNotSupportedException (not suppord ');}} /*************************************** **************************************** * ******************* function name: buildThumb function ************************************** ****** * **********************/Common functions buildThumb ($ FILE = null) {creator = $-> imgCreators [$-> sourceMine]; if (isset (file) {returns the creator ($ this-> thumb, $ File ); // Save the thumbnail} Other {returned creators ($ this-> "thumb");} public function getMine () {return $ this-> sourceMine ;} public function getThumbWidth () {returns $ this-> thumbWidth;} public function getThumbHeight () {returns $ this-> thumbHeight ;} /*************************************** ************************************* * ******************** Function name: initThumb function: *********************************** * ******************************/private function initThumb () {if ($ this-> scale) // determines whether to scale proportionally. {if ($-> sourceWidth >$-> sourceHeight) {-> thumbWidth =$-> maxWidth; $-> thumbHeight floor (-> sourceHeight * ($ this-> maxWidth/$ this-> sourceWidth);} others ($-> sourceWidth <$-> sourceHeight) {$ this-> thumbHeight = $ -> MaxHeight; $-> thumbWidth floor ($-> sourceWidth * ($-> maxHeight/$-> sourceHeight);} others {-> thumbWidth =$-> maxWidth; $ this-> thumbHeight =$-> maxHeight ;}} others {-> thumbWidth =$-> maxWidth; $ this-> thumbHeight =$-> maxHeight ;} -> thumb = imagecreatetruecolor ($-> thumbWidth, $-> thumbHeight) // create a blank thumbnail if ($-> sourceWidth <= $-> maxWidth & $-> sourceHeight <= $-> MaxHeight & $ this-> inflation = false) {-> thumb = $-> source;} Other {imagecopyresampled (-> thumb, $ this-> source, 0, 0, 0, // do you want to crop an image to a thumbnail? $-> ThumbWidth, $-> thumbHeight, $-> sourceWidth,-> sourceHeight) ;}}?>