Php Image Upload code

Here is a simple example:
Copy codeThe Code is as follows:
<?
// Http://www.jb51.net
Class upLoad {
Public $ length; // specify the file size.
Public $ file; // determines whether this class is used for Image Upload or file upload.
Public $ fileName; // file name
Public $ fileTemp; // upload a temporary file
Public $ fileSize; // file size to be uploaded
Public $ error; // whether the file to be uploaded is wrong. php4 does not
Public $ fileType; // File Upload type
Public $ directory ;//
Public $ maxLen;
Public $ errormsg;
Function _ construct ($ length, $ file = true, $ directory)
{
$ This-> maxLen = $ length;
$ This-& gt; length = $ length * 1024;
$ This-> file = $ file; // true indicates the normal file, and false indicates the image judgment.
$ This-> directory = $ directory;
}
Public function upLoadFile ($ fileField)
{
$ This-> fileName = $ fileField ['name'];
$ This-> fileTemp = $ fileField ['tmp _ name'];
$ This-> error = $ fileField ['error'];
$ This-> fileType = $ fileField ['type'];
$ This-> fileSize = $ fileField ['SIZE'];
$ PathSign = DIRECTORY_SEPARATOR ;///
If ($ this-> file) // upload a general file
{
$ Path = $ this-> _ isCreatedDir ($ this-> directory); // obtain the path
If ($ path) // http://www.jb51.net
{
$ CreateFileType = $ this-> _ getFileType ($ this-> fileName); // you can specify a file category.
$ CreateFileName = uniqid (rand (); // randomly generate a file name
$ ThisDir = $ this-> directory. $ pathSign. $ createFileName. ".". $ createFileType;
If (@ move_uploaded_file ($ this-> fileTemp, $ thisDir) // move the temporary file to the specified path
{
Return $ thisDir;
}
}
} Else {// Image Upload
$ Path = $ this-> _ isCreatedDir ($ this-> directory); // obtain the path
If ($ path) // path exists // http://www.jb51.net
{
$ CreateFileType = $ this-> _ getFileType ($ this-> fileName); // you can specify a file category.
$ CreateFileName = uniqid (rand ());
Return @ move_uploaded_file ($ this-> fileTemp, $ this-> directory. $ pathSign. $ createFileName. ".". $ createFileType )? True: false;
}
}
}
Public function _ isBig ($ length, $ fsize) // whether the returned file exceeds the specified size
{
Return $ fsize> $ length? True: false;
}
Public function _ getFileType ($ fileName) // obtain the file suffix
{
Return end (explode (".", $ fileName ));
}
Public function _ isImg ($ fileType) // whether the Image Upload type is allowed
{
$ Type = array ("jpeg", "gif", "jpg", "bmp ");
$ FileType = strtolower ($ fileType );
$ FileArray = explode ("/", $ fileType );
$ File_type = end ($ fileArray );
Return in_array ($ file_type, $ type); // http://www.jb51.net
}
Public function _ isCreatedDir ($ path) // check whether the path exists. If it does not exist, create it.
{
If (! File_exists ($ path ))
{
Return @ mkdir ($ path, 0755 )? True: false; // permission 755 //
}
Else
{
Return true;
}
}
Public function showError () // Display Error Information
// Http://www.jb51.net
Echo "<Script Language = 'javascript '> \ n history. back (); \ n alert ('$ this-> errormsg'); \ n </Script> \ n ";
Exit ();
}
}
Class multiUpLoad extends upLoad {
Public $ FILES;
Function _ construct ($ arrayFiles, $ length, $ file = true, $ directory)
{
$ This-> FILES = $ arrayFiles;
Parent: :__ construct ($ length, $ file, $ directory );
}
Function upLoadMultiFile ()
{
$ Arr = array ();
If ($ this-> _ judge () | $ this-> _ judge () = "no") // if all files meet the specifications, start uploading.
{
Foreach ($ this-> FILES as $ key => $ value)
{
$ StrDir = parent: upLoadFile ($ this-> FILES [$ key]);
Array_push ($ arr, $ strDir );
}
// Http://www.jb51.net
Return $ arr;
} Else
{
Return false;
}
}
Function _ judge ()
{
If ($ this-> file)
{
Foreach ($ this-> FILES as $ key => $ value)
{
If ($ this-> _ isBig ($ this-> length, $ value ['SIZE'])
{
$ This-> errormsg = "file exceeds $ this-> maxLen K ";
Parent: showError ();
}
If ($ value ['error'] = UPLOAD_ERR_NO_FILE)
{
// $ This-> errormsg = "An error occurred while uploading files ";
// Parent: showError ();
Return "no ";
}
}
Return true;
} Else
{
// Http://www.jb51.net
Foreach ($ this-> FILES as $ key => $ value)
{
If ($ this-> _ isBig ($ this-> length, $ value ['SIZE'])
{
$ This-> errormsg = "image exceeds $ this-> maxLen ";
Parent: showError ();
}
If ($ value ['error']! = 0)
{
$ This-> errormsg = "An error occurred while uploading images ";
Parent: showError ();
}
If (! $ This-> _ isImg ($ value ['type'])
{
$ This-> errormsg = "incorrect image format ";
Parent: showError ();
}
}
Return true;
}
}
}
?>

A more complex php Upload class that can automatically generate thumbnails
Step 1:
Create folders and layout:
Annex: attachment (stores the uploaded original image in this directory)
|-Smallimg: stores thumbnail slices.
|-Mark: stores watermark images.
Include: stores class files and fonts (the code used in this program is 04b_082.16.ttf)
|-Upfile. php: integrates simple upload to generate thumbnails and watermark class file information
|-04b_082.16.ttf: Font File
Test. php: test File
Step 2 upload class
Upfile. php
Copy codeThe Code is as follows:
<? Php
Class UPImages {
Var $ attachment folder = "annex"; // The attachment storage point. The default value is annex.
Var $ smallFolder = "smallimg"; // path for storing thumbnails. Note: The path must be a subdirectory under $ Alibaba folder. The default value is smallimg.
Var $ markFolder = "mark"; // watermark image storage location
Var $ upFileType = "jpg gif png"; // the upload type. Default Value: jpg gif png rar zip
Var $ upFileMax = 1024; // The maximum upload size. The unit is "KB". The default value is KB.
Var $ fontType; // font
Var $ maxWidth = 500; // maximum Image Width
Var $ maxHeight = 600; // maximum Image Height
Function UPImages ($ inclufolder, $ smallFolder, $ includeFolder ){
$ This-> folder = $ folder;
$ This-> smallFolder = $ smallFolder;
$ This-> fontType = $ includeFolder. "/04b_082.16.ttf ";
}
Function upLoad ($ inputName ){
$ ImageName = time (); // set the current time to the image name
If (@ empty ($ _ FILES [$ inputName] ["name"]) die (error ("no image information is uploaded, please confirm "));
$ Name = explode (".", $ _ FILES [$ inputName] ["name"]); // separate the FILES before upload with "." To obtain the file type
$ ImgCount = count ($ name); // obtain the number of interceptions.
$ ImgType = $ name [$ imgCount-1]; // type of the retrieved File
If (strpos ($ this-> upFileType, $ imgType) === false) die (error ("only supported File Upload types ". $ this-> upFileType. "Not Supported ". $ imgType ));
$ Photo = $ imageName. ".". $ imgType; // name of the file written to the database
$ UploadFile = $ this-> folder. "/". $ photo; // name of the uploaded file
$ UpFileok = move_uploaded_file ($ _ FILES [$ inputName] ["tmp_name"], $ uploadFile );
If ($ upFileok ){
$ ImgSize = $ _ FILES [$ inputName] ["size"];
$ KSize = round ($ imgSize/1024 );
If ($ kSize> ($ this-> upFileMax * 1024 )){
@ Unlink ($ uploadFile );
Die (error ("uploaded file exceeds". $ this-> upFileMax. "KB "));
}
} Else {
Die (error ("failed to upload the image, please make sure that your upload file does not exceed $ upFileMax KB or the upload time has timed out "));
}
Return $ photo;
}
Function getInfo ($ photo ){
$ Photo = $ this-> specify folder. "/". $ photo;
$ ImageInfo = getimagesize ($ photo );
$ ImgInfo ["width"] = $ imageInfo [0];
$ ImgInfo ["height"] = $ imageInfo [1];
$ ImgInfo ["type"] = $ imageInfo [2];
$ ImgInfo ["name"] = basename ($ photo );
Return $ imgInfo;
}
Function smallImg ($ photo, $ width = 128, $ height = 128 ){
$ ImgInfo = $ this-> getInfo ($ photo );
$ Photo = $ this-> getting folder. "/". $ photo; // obtain the image source
$ NewName = substr ($ imgInfo ["name"], 0, strrpos ($ imgInfo ["name"], "."). "_thumb.jpg"; // new image name
If ($ imgInfo ["type"] = 1 ){
$ Img = imagecreatefromgif ($ photo );
} Elseif ($ imgInfo ["type"] = 2 ){
$ Img = imagecreatefromjpeg ($ photo );
} Elseif ($ imgInfo ["type"] = 3 ){
$ Img = imagecreatefrompng ($ photo );
} Else {
$ Img = "";
}
If (empty ($ img) return False;
$ Width = ($ width> $ imgInfo ["width"])? $ ImgInfo ["width"]: $ width;
$ Height = ($ height> $ imgInfo ["height"])? $ ImgInfo ["height"]: $ height;
$ SrcW = $ imgInfo ["width"];
$ SrcH = $ imgInfo ["height"];
If ($ srcW * $ width> $ srcH * $ height ){
$ Height = round ($ srcH * $ width/$ srcW );
} Else {
$ Width = round ($ srcW * $ height/$ srcH );
}
If (function_exists ("imagecreatetruecolor ")){
$ NewImg = imagecreatetruecolor ($ width, $ height );
ImageCopyResampled ($ newImg, $ img, 0, 0, 0, $ width, $ height, $ imgInfo ["width"], $ imgInfo ["height"]);
} Else {
$ NewImg = imagecreate ($ width, $ height );
ImageCopyResized ($ newImg, $ img, 0, 0, 0, $ width, $ height, $ imgInfo ["width"], $ imgInfo ["height"]);
}
If ($ this-> toFile ){
If (file_exists ($ this-> folder. "/". $ this-> smallFolder. "/". $ newName) @ unlink ($ this-> folder. "/". $ this-> smallFolder. "/". $ newName );
ImageJPEG ($ newImg, $ this-> exist folder. "/". $ this-> smallFolder. "/". $ newName );
Return $ this-> revoke folder. "/". $ this-> smallFolder. "/". $ newName;
} Else {
ImageJPEG ($ newImg );
}
ImageDestroy ($ newImg );
ImageDestroy ($ img );
Return $ newName;
}
Function waterMark ($ photo, $ text ){
$ ImgInfo = $ this-> getInfo ($ photo );
$ Photo = $ this-> specify folder. "/". $ photo;
$ NewName = substr ($ imgInfo ["name"], 0, strrpos ($ imgInfo ["name"], "."). "_mark.jpg ";
Switch ($ imgInfo ["type"]) {
Case 1:
$ Img = imagecreatefromgif ($ photo );
Break;
Case 2:
$ Img = imagecreatefromjpeg ($ photo );
Break;
Case 3:
$ Img = imagecreatefrompng ($ photo );
Break;
Default:
Return False;
}
If (empty ($ img) return False;
$ Width = ($ this-> maxWidth> $ imgInfo ["width"])? $ ImgInfo ["width"]: $ this-> maxWidth;
$ Height = ($ this-> maxHeight> $ imgInfo ["height"])? $ ImgInfo ["height"]: $ this-> maxHeight;
$ SrcW = $ imgInfo ["width"];
$ SrcH = $ imgInfo ["height"];
If ($ srcW * $ width> $ srcH * $ height ){
$ Height = round ($ srcH * $ width/$ srcW );
} Else {
$ Width = round ($ srcW * $ height/$ srcH );
}
If (function_exists ("imagecreatetruecolor ")){
$ NewImg = imagecreatetruecolor ($ width, $ height );
ImageCopyResampled ($ newImg, $ img, 0, 0, 0, $ width, $ height, $ imgInfo ["width"], $ imgInfo ["height"]);
} Else {
$ NewImg = imagecreate ($ width, $ height );
ImageCopyResized ($ newImg, $ img, 0, 0, 0, $ width, $ height, $ imgInfo ["width"], $ imgInfo ["height"]);
}
$ White = imageColorAllocate ($ newImg, 255,255,255 );
$ Black = imageColorAllocate ($ newImg, 0, 0, 0 );
$ Alpha = imageColorAllocateAlpha ($ newImg, 230,230,230, 40 );
ImageFilledRectangle ($ newImg, 0, $ height-26, $ width, $ height, $ alpha );
ImageFilledRectangle ($ newImg, 13, $ height-20, 15, $ height-7, $ black );
ImageTTFText ($ newImg, 4.9, 0, 20, $ height-14, $ black, $ this-> fontType, $ text [0]);
ImageTTFText ($ newImg, 4.9, 0, 20, $ height-6, $ black, $ this-> fontType, $ text [1]);
If ($ this-> toFile ){
If (file_exists ($ this-> folder. "/". $ this-> markFolder. "/". $ newName) @ unlink ($ this-> folder. "/". $ this-> markFolder. "/". $ newName );
ImageJPEG ($ newImg, $ this-> composer folder. "/". $ this-> markFolder. "/". $ newName );
Return $ this-> exist folder. "/". $ this-> markFolder. "/". $ newName;
} Else {
ImageJPEG ($ newImg );
}
ImageDestroy ($ newImg );
ImageDestroy ($ img );
Return $ newName;
}
}
?>

Step 3: test the upload class
Test. php
Copy codeThe Code is as follows:
<? Php
$ Export folder = "annex ";
$ SmallFolder = "smallimg ";
$ MarkFolder = "mark ";
$ IncludeFolder = "include ";
Require ("./". $ includeFolder. "/upfile. php ");
$ Img = new UPImages ($ inclufolder, $ smallFolder, $ includeFolder );
$ Text = array ("www.jb51.net", "all rights reserved ");
If (@ $ _ GET ["go"]) {
$ Photo = $ img-> upLoad ("upfile ");
$ Img-> maxWidth = $ img-> maxHeight = 350; // set the watermark image value.
$ Img-> toFile = true;
$ NewSmallImg = $ img-> smallImg ($ photo );
$ NewMark = $ img-> waterMark ($ photo, $ text );
Echo " <br> ";
Echo " <br> ";
Echo "<a href = './test. php'> continue upload </a> ";
} Else {
?>
<Form method = "post" action = "./test. php? Go = go "enctype =" multipart/form-data ">
<Input type = "file" name = "upfile"> <br>
<Input type = "submit" value = "Upload">
</Form>
<? Php
}
?>