有缩略图功能 但是 感觉不全面,而且有点问题,继续学习,将来以后修改下
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<form action= "<?php $_SERVER['PHP_SELF']; ?>" enctype= "multipart/form-data" method= "post" ><input type= "text" name= "name" /><input type= "file" name= "file" /><input type= "submit" name= 'submit' value= "提交" ></form>
<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2016/6/28
* Time: 21:04
*/
class upload{
protected $fileMine ; //文件上传类型
protected $filepath ; //文件上传路径
protected $filemax ; //文件上传大小
protected $fileExt ; //文件上传格式
protected $filename ; //文件名
protected $fileerror ; //文件出错设置
protected $fileflag ; //文件检测
protected $fileinfo ; //FILES
protected $ext ; //文件扩展
protected $path ;
//文件上传
public function __construct( $filename = "file" , $filemax =20000000, $filepath = "./Uploads" , $fileflag =true, $fileExt = array ( 'jpg' , 'exe' ), $fileMine = array ( 'image/jpeg' ))
{
$this ->filename= $filename ;
$this ->fileinfo= $_FILES [ $this ->filename];
$this ->filemax= $filemax ;
$this ->filepath= $filepath ;
$this ->fileflag= $fileflag ;
$this ->fileExt= $fileExt ;
$this ->fileMine= $fileMine ;
//var_dump($this->filename);
}
//错误判断
public function UpError(){
if ( $this ->fileinfo[ 'error' ]>0){
switch ( $this ->fileinfo[ 'error' ])
{
case 1:
$this ->fileerror= "上传文件大小超过服务器允许上传的最大值,php.ini中设置upload_max_filesize选项限制的值 " ;
break ;
case 2:
$this ->fileerror= "上传文件大小超过HTML表单中隐藏域MAX_FILE_SIZE选项指定的值" ;
break ;
case 3:
$this ->fileerror= "文件部分被上传" ;
break ;
case 4:
$this ->fileerror= "没有选择上传文件" ;
break ;
case 5:
$this ->fileerror= "未找到临时目录" ;
break ;
case 6:
$this ->fileerror= "文件写入失败" ;
break ;
case 7:
$this ->fileerror= "php文件上传扩展没有打开 " ;
break ;
case 8:
$this ->fileerror= "" ;
break ;
}
return false;
}
return true;
}
//检测文件类型
public function UpMine(){
if (!in_array( $this ->fileinfo[ 'type' ], $this ->fileMine)) {
$this ->error= "文件上传类型不对" ;
return false;
}
return true;
}
//检测文件格式
public function UpExt(){
$this ->ext= pathinfo ( $this ->fileinfo[ 'name' ],PATHINFO_EXTENSION);
//var_dump($ext);
if (!in_array( $this ->ext, $this ->fileExt)){
$this ->fileerror= "文件格式不对" ;
return false;
}
return true;
}
//检测文件路径
public function UpPath(){
if (! file_exists ( $this ->filepath)){
mkdir ( $this ->filepath,0777,true);
}
}
//检测文件大小
public function UpSize(){
$max = $this ->fileinfo[ 'size' ];
if ( $max > $this ->filemax){
$this ->fileerror= "文件过大" ;
return false;
}
return true;
}
//检测文件是否HTTP
public function UpPost(){
if (! is_uploaded_file ( $this ->fileinfo[ 'tmp_name' ])){
$this ->fileerror= "恶意上偿还" ;
return false;
}
return true;
}
//文件名防止重复
public function Upname(){
return md5(uniqid(microtime(true),true));
}
//图片缩略图
public function Smallimg( $x =100, $y =100){
$imgAtt = getimagesize ( $this ->path);
//图像宽,高,类型
$imgWidth = $imgAtt [0];
$imgHeight = $imgAtt [1];
$imgext = $imgAtt [2];
//等比列缩放
if (( $x / $imgWidth )>( $y / $imgHeight )){
$bl = $y / $imgHeight ;
} else {
$bl = $x / $imgWidth ;
}
$x = floor ( $imgWidth * $bl ); //缩放后
$y = floor ( $imgHeight * $bl );
$images =imagecreatetruecolor( $x , $y );
$big =imagecreatefromjpeg( $this ->path);
imagecopyresized( $images , $big ,0,0,0,0, $x , $y , $imgWidth , $imgWidth );
switch ( $imgext ){
case 1:
$imageout =imagecreatefromgif( $this ->path);
break ;
case 2:
$imageout =imagecreatefromjpeg( $this ->path);
break ;
case 3:
$imageout =imagecreatefromgif( $this ->path);
break ;
}
$im =imagejpeg( $images , $this ->path);
}
//文件双传
public function uploads()
{
if ( $this ->UpError()&& $this ->UpMine()&& $this ->UpExt()&& $this ->UpSize()&& $this ->UpPost()){
$this ->UpPath();
$names = $this ->Upname();
$this ->path= $this ->filepath. '/' . $names . '.' . $this ->ext;
if (move_uploaded_file( $this ->fileinfo[ 'tmp_name' ], $this ->path)){
return $this ->path;
} else {
$this ->fileerror= "上传失败" ;
}
} else {
exit ( "<b>" . $this ->fileerror. "</b>" );
}
}
}
?>
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<?php
header( "content-type:imagejpeg" );
header( "Content-type:text/html;charset=utf-8" );
require 'list.php' ;
$u = new upload();
$a = $u ->uploads();
$c = $u ->Smallimg();
echo "<img src={$a} />" ;
echo "<img src={$c} />" ;
?>
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<!DOCTYPE html>
<html>
<head>
<meta charset= "utf-8" >
<meta http-equiv= "X-UA-Compatible" content= "IE=edge,chrome=1" >
<title>Examples</title>
<meta name= "description" content= "" >
<meta name= "keywords" content= "" >
<link href= "" rel= "stylesheet" >
</head>
<body>
<form action= "ce.php" enctype= "multipart/form-data" method= "post" >
<input type= "text" name= "name" /><input type= "file" name= "file" />
<input type= "submit" name= 'submit' value= "提交" >
</form>
</body>
</html>
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以上这篇PHP之图片上传类实例代码(加了缩略图)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。