PHP image upload class code_PHP tutorial-PHP Tutorial-php.cn

Let’s start with a simple one:

Copy the code The code is as follows:

 
//http:// www.jb51.net 
class upLoad{ 
public $length; //Limit file size
public $file; //Determine whether this class is used for image upload or file upload
public $fileName; //File name
public $fileTemp; //Upload temporary file
public $fileSize; //Upload file size
public $error; //Whether there is an error in uploading the file, php4 does not have it
public $ fileType; //Upload file type
public $directory; // 
public $maxLen; 
public $errormsg; 
function __construct($length,$file=true,$directory) 
 { 
$this->maxLen=$length; 
$this->length=$length*1024; 
$this->file=$file; //true is a general file, false For 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) // General file upload
{ 
$path = $this->_isCreatedDir($this->directory);//Get the path
if($path)//http://www.jb51. net 
{ 
$createFileType = $this->_getFileType($this->fileName); //Set the file category 
$createFileName=uniqid(rand()); //Randomly generate file names 
$thisDir=$this->directory.$pathSign.$createFileName.".".$createFileType; 
if(@move_uploaded_file($this->fileTemp,$thisDir)) //Move the temporary file Move to the specified path
{ 
return $thisDir; 
} 
} 
}else{ //Image upload
$path = $this->_isCreatedDir($this ->directory);//Get the path
if($path)//The path exists//http://www.jb51.net 
{ 
$createFileType = $this->_getFileType( $this->fileName);//Set the file category 
$createFileName=uniqid(rand()); 
return @move_uploaded_file($this->fileTemp,$this->directory.$pathSign. $createFileName.".".$createFileType) ? true : false; 
} 
} 
} 
public function _isBig($length,$fsize) //Returns whether the file exceeds the specified size
{ 
return $fsize>$length ? true : false; 
} 
public function _getFileType($fileName) //Get the suffix of the file
{ 
return end(explode(". ",$fileName)); 
} 
public function _isImg($fileType) //Whether the uploaded image 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($path) //Whether the path exists, create it if it does not exist
{ 
if(!file_exists($path)) 
{ 
return @mkdir($path,0755)?true:false; //Permissions 755// 
} 
else 
{ 
return true; 
} 
} 
public function showError() //Display error message
{//http://www.jb51.net 
echo " 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()||$this->_judge()=="no") //All files meet the specifications, start uploading
{ 
foreach($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) 
{ 
//$this->errormsg="Upload file appears Error"; 
//parent::showError(); 
return "no"; 
} 
} 
return true; 
}else 
{ 
/ /http://www.jb51.net 
foreach($this->FILES as $key=>$value) 
{ 
if($this->_isBig($this-> ;length,$value['size'])) 
{ 
$this->errormsg="Image exceeds $this->maxLen"; 
parent::showError(); 
 } 
if($value['error']!=0) 
{ 
$this->errormsg="An error occurred while uploading the image"; 
parent::showError(); 
} 
if(!$this->_isImg($value['type'])) 
{ 
$this->errormsg="The image format is incorrect"; 
parent:: showError(); 
} 
} 
return true; 
} 
} 
} 
?> 

Let’s take a more complicated PHP upload class that can automatically generate thumbnails.
Start the first step:
Create a folder, layout:
annex: attachment (uploaded files are stored in this directory Original image)
|— smallimg: stores thumbnail images
|— mark: stores watermark images
include: stores class files and fonts (this program code uses: 04B_08__.TTF)
| — upfile.php: Integrate simple upload, generate class file information of thumbnails and watermarks
|— 04B_08__.TTF: font file
test.php: test file
The second step is to upload the class
upfile.php

Copy code The code is as follows:

 
class UPImages { 
var $annexFolder = "annex";//Attachment storage point, the default is: annex 
var $smallFolder = "smallimg";// Thumbnail storage path, note: must be placed in a subdirectory under $annexFolder, the default is: smallimg 
var $markFolder = "mark";//Watermark image storage location 
var $upFileType = "jpg gif png ";//Upload type, the default is: jpg gif png rar zip 
var $upFileMax = 1024;//Upload size limit, the unit is "KB", the default is: 1024KB 
var $fontType;// Font
var $maxWidth = 500; //Maximum image width
var $maxHeight = 600; //Maximum image height
function UPImages($annexFolder,$smallFolder,$includeFolder) { 
$this ->annexFolder = $annexFolder; 
$this->smallFolder = $smallFolder; 
$this->fontType = $includeFolder."/04B_08__.TTF"; 
} 
function upLoad ($inputName) { 
$imageName = time();//Set the current time to the image name
if(@empty($_FILES[$inputName]["name"])) die(error(" There is no image information uploaded, please confirm")); 
$name = explode(".",$_FILES[$inputName]["name"]);//Separate the files before uploading with "." to obtain the files Type
$imgCount = count($name);//Get the number of interceptions
$imgType = $name[$imgCount-1];//Get the type of file
if(strpos($this- >upFileType,$imgType) === false) die(error("The uploaded file type only supports ".$this->upFileType." does not support ".$imgType)); 
$photo = $imageName. ".".$imgType;//The file name written to the database
$uploadFile = $this->annexFolder."/".$photo;//The uploaded file name
$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($uploadFile); 
die(error("The uploaded file exceeds" .$this->upFileMax."KB")); 
} 
} else { 
die(error("Failed to upload image, please make sure your uploaded file does not exceed $upFileMax KB or the upload time Timeout")); 
} 
return $photo; 
} 
function getInfo($photo) { 
$photo = $this->annexFolder."/".$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 = $this->annexFolder."/".$photo;// Get the picture source
$newName = substr($imgInfo["name"],0,strrpos($imgInfo["name"], "."))."_thumb.jpg";//New picture name
if($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, 0, $width, $height, $imgInfo["width"], $imgInfo["height"]); 
} else { 
$newImg = imagecreate($width, $height); 
ImageCopyResized($newImg, $img, 0, 0, 0, 0, $width, $height, $imgInfo["width"], $ imgInfo["height"]); 
} 
if ($this->toFile) { 
if (file_exists($this->annexFolder."/".$this->smallFolder. "/".$newName)) @unlink($this->annexFolder."/".$this->smallFolder."/".$newName); 
ImageJPEG($newImg,$this-> annexFolder."/".$this->smallFolder."/".$newName); 
return $this->annexFolder."/".$this->smallFolder."/".$newName; 
} else { 
ImageJPEG($newImg); 
} 
ImageDestroy($newImg); 
ImageDestroy($img); 
return $newName; 
} 
function waterMark($photo,$text) { 
$imgInfo = $this->getInfo($photo); 
$photo = $this->annexFolder."/".$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, 0, $width, $height, $imgInfo["width"], $imgInfo["height"]); 
} else { 
$newImg = imagecreate($width, $height); 
ImageCopyResized($newImg, $img, 0, 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($this->annexFolder."/".$this->markFolder."/".$newName)) @unlink($this->annexFolder."/".$this->markFolder."/".$newName); 
ImageJPEG($newImg,$this->annexFolder."/".$this->markFolder."/".$newName); 
return $this->annexFolder."/".$this->markFolder."/".$newName; 
} else { 
ImageJPEG($newImg); 
} 
ImageDestroy($newImg); 
ImageDestroy($img); 
return $newName; 
} 
} 
?> 

第三步：测试上传类
test.php

复制代码代码如下:

$annexFolder = "annex";
$smallFolder = "smallimg";
$markFolder = "mark";
$includeFolder = "include";
require("./".$includeFolder."/upfile.php");
$img = new UPImages($annexFolder,$smallFolder,$includeFolder);
$text = array("www.jb51.net","all rights reserved");
if(@$_GET["go"]) {
$photo = $img->upLoad("upfile");
$img->maxWidth = $img->maxHeight = 350;//设置生成水印图像值
$img->toFile = true;
$newSmallImg = $img->smallImg($photo);
$newMark = $img->waterMark($photo,$text);
echo "

";
echo "

";
echo "继续上传";
} else {
?>

}
?>