有縮圖功能 但是 感覺不全面，而且有點問題，繼續學習，將來以後修改下
<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;//檔案上傳類型protected $filepath;//檔案上傳路徑protected $filemax;//檔案上傳大小protected $fileExt;//檔案上傳格式protected $filename;//檔案名稱protected $fileerror;//檔案出錯設定protected $fileflag;//檔案檢測protected $fileinfo; //FILESprotected $ext; //檔案擴充protected $path;//檔案上傳public function __construct($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="上傳檔案大小超過伺服器允許上傳的最大值，php.ini中設定upload_max_filesize選項限制的值 ";break;case 2:$this->fileerror="上傳檔案大小超過HTML表單中隱藏欄位MAX_FILE_SIZE選項指定的值";break;case 3:$this->fileerror="檔案部分被上傳";break;case 4:$this->fileerror="沒有選擇上傳檔案";break;case 5:$this->fileerror="未找到臨時目錄";break;case 6:$this->fileerror="檔案寫入失敗";break;case 7:$this->fileerror="php檔案上傳擴充沒有開啟 ";break;case 8:$this->fileerror="";break;}return false;}return true;}//檢測檔案類型public function UpMine(){if(!in_array($this->fileinfo['type'],$this->fileMine)) {$this->error="檔案上傳類型不對";return false;}return true;}//檢測檔案格式public function UpExt(){$this->ext=pathinfo($this->fileinfo['name'],PATHINFO_EXTENSION);//var_dump($ext);if(!in_array($this->ext,$this->fileExt)){$this->fileerror="檔案格式不對";return false;}return true;}//檢測檔案路徑public function UpPath(){if(!file_exists($this->filepath)){mkdir($this->filepath,0777,true);}}//檢測檔案大小public function UpSize(){$max=$this->fileinfo['size'];if($max>$this->filemax){$this->fileerror="檔案過大";return false;}return true;}//檢測檔案是否HTTPpublic function UpPost(){if(!is_uploaded_file($this->fileinfo['tmp_name'])){$this->fileerror="惡意上償還";return false;}return true;}//檔案名稱防止重複public function Upname(){return md5(uniqid(microtime(true),true));}//圖片縮圖public function Smallimg($x=100,$y=100){$imgAtt=getimagesize($this->path);//映像寬，高，類型$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); //縮放後$y=floor($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);}//檔案雙傳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>".$this->fileerror."</b>");}}}<?phpheader("content-type:imagejpeg");header("Content-type:text/html;charset=utf-8");require 'list.php';$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上傳圖片類顯示縮圖功能的相關知識，希望對大家有所協助，如果大家有任何疑問請給我留言，小編會及時回複大家的。在此也非常感謝大家對雲棲社區網站的支援！
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