PHP文件上传
一、普通文件上传方式
使用原生态的php上传文件。
(1)前端代码
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(2)php代码(upload_file.php)
<?php if ((($_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES["file"]["type"] == "image/pjpeg"))&& ($_FILES["file"]["size"] < 20000)){ if ($_FILES["file"]["error"] > 0) { echo "Return Code: " . $_FILES["file"]["error"] . "<br>"; }else { echo "Upload: " . $_FILES["file"]["name"] . "<br>"; echo "Type: " . $_FILES["file"]["type"] . "<br>"; echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br>"; echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>"; if (file_exists("upload/" . $_FILES["file"]["name"])){ echo $_FILES["file"]["name"] . " already exists. "; }else{ move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]); echo "Stored in: " . "upload/" . $_FILES["file"]["name"]; } } }else { echo "Invalid file"; } ?>
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二、异步文件上传方式
目的是尽量少使用插件。于是使用iframe异步上传文件
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(1)前端html
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function startUpload() { var spanObj = document.getElementById("info"); spanObj.innerHTML = " 开始上传"; document.getElementById("upForm").sumbit(); } //回调 function stopUpload(responseText){ var spanObj = document.getElementById("info"); spanObj.innerHTML = "上传成功"; spanObj.innerHTML = responseText; }
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(2)服务器端代码
$file = $_FILES['myfile']; $fileName = uploadFile($file); //$result = readFromFile("../upload/" . $fileName); echo "<script type="text/javascript">window.top.window.stopUpload('{$fileName}')</script>"; function uploadFile($file) { // 上传路径 $destinationPath = "../upload/"; if (!file_exists($destinationPath)){ mkdir($destinationPath , 0777); } //重命名 $fileName = date('YmdHis') . '_' . iconv('utf-8' , 'gb2312' , basename($file['name'])); if (move_uploaded_file($file['tmp_name'], $destinationPath . $fileName)) { return iconv('gb2312' , 'utf-8' , $fileName); } return ''; }
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//代码注释 /* 1,关于basename方法 $path = "/testweb/home.php"; //显示带有文件扩展名的文件名 echo basename($path); //显示不带有文件扩展名的文件名 echo basename($path,".php"); 2,关于iconv iconv('gb2312' , 'utf-8' , $fileName);//将$fileName从gb2312转为utf-8格式。 注:该函数需要开启php.ini里面的php_iconv.dll 3,关于$_FILES['myfile'] $_FILES相当于一个二维数组,而$_FILES['myfile']相当于一个一维数组。所以可以 $f = $_FILES['myfile']; echo $f['name']; 如果直接访问该$_FILES['myfile'],则会报Undefined index: myfile。此时加上 if(!isset($_FILES['myfile'])){ die('上传文件不存在!'); } */