這篇文章主要介紹了PHP上傳圖片類顯示縮略圖功能的相關(guān)資料,重點強調(diào)下帶有縮鏍圖，但是感覺不全面，后續(xù)還會繼續(xù)修改，需要的朋友可以參考下
有縮略圖功能 但是 感覺不全面，而且有點問題，繼續(xù)學習，將來以后修改下
<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;//文件上傳類型
protected $filepath;//文件上傳路徑
protected $filemax;//文件上傳大小
protected $fileExt;//文件上傳格式
protected $filename;//文件名
protected $fileerror;//文件出錯設(shè)置
protected $fileflag;//文件檢測
protected $fileinfo; //FILES
protected $ext; //文件擴展
protected $path;
//文件上傳
public function __construct($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($this->filename);
}
//錯誤判斷
public function UpError(){
if($this->fileinfo['error']>0){
switch($this->fileinfo['error'])
{
case 1:
$this->fileerror="上傳文件大小超過服務器允許上傳的最大值，php.ini中設(shè)置upload_max_filesize選項限制的值 ";
break;
case 2:
$this->fileerror="上傳文件大小超過HTML表單中隱藏域MAX_FILE_SIZE選項指定的值";
break;
case 3:
$this->fileerror="文件部分被上傳";
break;
case 4:
$this->fileerror="沒有選擇上傳文件";
break;
case 5:
$this->fileerror="未找到臨時目錄";
break;
case 6:
$this->fileerror="文件寫入失敗";
break;
case 7:
$this->fileerror="php文件上傳擴展沒有打開 ";
break;
case 8:
$this->fileerror="";
break;
}
return false;
}
return true;
}
//檢測文件類型
public function UpMine(){
if(!in_array($this->fileinfo['type'],$this->fileMine)) {
$this->error="文件上傳類型不對";
return false;
}
return true;
}
//檢測文件格式
public function UpExt(){
$this->ext=pathinfo($this->fileinfo['name'],PATHINFO_EXTENSION);
//var_dump($ext);
if(!in_array($this->ext,$this->fileExt)){
$this->fileerror="文件格式不對";
return false;
}
return true;
}
//檢測文件路徑
public function UpPath(){
if(!file_exists($this->filepath)){
mkdir($this->filepath,0777,true);
}
}
//檢測文件大小
public function UpSize(){
$max=$this->fileinfo['size'];
if($max>$this->filemax){
$this->fileerror="文件過大";
return false;
}
return true;
}
//檢測文件是否HTTP
public function UpPost(){
if(!is_uploaded_file($this->fileinfo['tmp_name'])){
$this->fileerror="惡意上償還";
return false;
}
return true;
}
//文件名防止重復
public function Upname(){
return md5(uniqid(microtime(true),true));
}
//圖片縮略圖
public function Smallimg($x=100,$y=100){
$imgAtt=getimagesize($this->path);
//圖像寬，高，類型
$imgWidth=$imgAtt[0];
$imgHeight=$imgAtt[1];
$imgext=$imgAtt[2];
//等比列縮放
if(($x/$imgWidth)>($y/$imgHeight)){
$bl=$y/$imgHeight;
}else{
$bl=$x/$imgWidth;
}
$x=floor($imgWidth*$bl); //縮放后
$y=floor($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,$this->path);
}
//文件雙傳
public function uploads()
{
if($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{
$this->fileerror="上傳失敗";
}
}else{
exit("<b>".$this->fileerror."</b>");
}
}
}
<?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} />";
?>
<!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>
以上所述是小編給大家介紹的PHP上傳圖片類顯示縮略圖功能的相關(guān)知識，希望對大家有所幫助