PHP文件上傳類實(shí)例詳解

2020-03-24 18:56:46

字體：大中小

供稿：網(wǎng)友

本文實(shí)例講述了PHP文件上傳類。分享給大家供大家參考，具體如下：這里演示了FileUpload.html' target='_blank'>class.php文件上傳類，其中用到了兩個(gè)常量，可在網(wǎng)站配置文件中定義：define('ROOT_PATH',dirname(__FILE__)); //網(wǎng)站根目錄define('UPDIR','/uploads/'); //上傳主目錄具體代碼如下： //上傳文件類 class FileUpload { private $error; //錯(cuò)誤代碼 private $maxsize; //表單最大值 private $type; //類型 private $typeArr = array('image/jpeg','image/pjpeg','image/png','image/x-png','image/gif'); //類型合集 private $path; //目錄路徑 private $today; //今天目錄 private $name; //文件名 private $tmp; //臨時(shí)文件 private $linkpath; //鏈接路徑 private $linktotay; //今天目錄（相對(duì)） //構(gòu)造方法，初始化 public function __construct($_file,$_maxsize) { $this- error = $_FILES[$_file]['error']; $this- maxsize = $_maxsize / 1024; $this- type = $_FILES[$_file]['type']; $this- path = ROOT_PATH.UPDIR; $this- linktotay = date('Ymd').'/'; $this- today = $this- path.$this- linktotay; $this- name = $_FILES[$_file]['name']; $this- tmp = $_FILES[$_file]['tmp_name']; $this- checkError(); $this- checkType(); $this- checkPath(); $this- moveUpload(); //返回路徑 public function getPath() { $_path = $_SERVER["SCRIPT_NAME"]; $_dir = dirname(dirname($_path)); if ($_dir == '//') $_dir = '/'; $this- linkpath = $_dir.$this- linkpath; return $this- linkpath; //移動(dòng)文件 private function moveUpload() { if (is_uploaded_file($this- tmp)) { if (!move_uploaded_file($this- tmp,$this- setNewName())) { Tool::alertBack('警告：上傳失敗！'); } else { Tool::alertBack('警告：臨時(shí)文件不存在！'); //設(shè)置新文件名 private function setNewName() { $_nameArr = explode('.',$this- name); $_postfix = $_nameArr[count($_nameArr)-1]; $_newname = date('YmdHis').mt_rand(100,1000).'.'.$_postfix; $this- linkpath = UPDIR.$this- linktotay.$_newname; return $this- today.$_newname; //驗(yàn)證目錄 private function checkPath() { if (!is_dir($this- path) || !is_writeable($this- path)) { if (!mkdir($this- path)) { Tool::alertBack('警告：主目錄創(chuàng)建失??！'); if (!is_dir($this- today) || !is_writeable($this- today)) { if (!mkdir($this- today)) { Tool::alertBack('警告：子目錄創(chuàng)建失敗！'); //驗(yàn)證類型 private function checkType() { if (!in_array($this- type,$this- typeArr)) { Tool::alertBack('警告：不合法的上傳類型！'); //驗(yàn)證錯(cuò)誤 private function checkError() { if (!empty($this- error)) { switch ($this- error) { case 1 : Tool::alertBack('警告：上傳值超過了約定最大值！'); break; case 2 : Tool::alertBack('警告：上傳值超過了'.$this- maxsize.'KB！'); break; case 3 : Tool::alertBack('警告：只有部分文件被上傳！'); break; case 4 : Tool::alertBack('警告：沒有任何文件被上傳！'); break; default: Tool::alertBack('警告：未知錯(cuò)誤！');
static public function alertBack($_info) { echo " script type='text/javascript' alert('$_info');history.back(); /script exit(); } //彈窗賦值關(guān)閉 static public function alertOpenerClose($_info,$_path) { echo " script type='text/javascript' alert('$_info'); /script echo " script type='text/javascript' opener.document.content.thumbnail.value='$_path'; /script echo " script type='text/javascript' opener.document.content.pic.style.display='block'; /script echo " script type='text/javascript' opener.document.content.pic.src='$_path'; /script echo " script type='text/javascript' window.close(); /script exit();
下面進(jìn)行一個(gè)實(shí)例演示，請(qǐng)看下面的步驟：1、先創(chuàng)建一個(gè) index.php 頁面，做一個(gè)表單index.php !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" html xmlns="http://www.w3.org/1999/xhtml" head meta http-equiv="Content-Type" content="text/html; charset=utf-8" / title main /title /head body form name="content" method="post" action=" action=add" input type="text" name="thumbnail" readonly="readonly" / input type="button" value="上傳" / img name="pic" / ( * 必須是jpg,gif,png，并且200k內(nèi)) br / /form /body /html 2、創(chuàng)建 upfile.html 文件，建立表單提交到 upload.phpupfile.html !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" html xmlns="http://www.w3.org/1999/xhtml" head meta http-equiv="Content-Type" content="text/html; charset=utf-8" / title 上傳圖片 /title /head body /p p form method="post" action="./upload.php" enctype="multipart/form-data" input type="hidden" name="MAX_FILE_SIZE" value="204800" / input type="file" name="pic" / input type="submit" name="send" value="確定上傳" / /form /p p /body /html 3、通過 upload.php 文件調(diào)用文件上傳類實(shí)現(xiàn)上傳，并且把路徑賦給 input 標(biāo)簽和顯示圖片 require 'FileUpload.class.php'; if (isset($_POST['send'])) { $_fileupload = new FileUpload('pic',$_POST['MAX_FILE_SIZE']); $_path = $_fileupload- getPath(); Tool::alertOpenerClose('文件上傳成功！',$_path); } else { Tool::alertBack('警告：文件過大或者其他未知錯(cuò)誤導(dǎo)致瀏覽器崩潰！');
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