1.目录结构
2.index.php
<html>
<head>
<meta charset="utf-8">
<title>上传文件</title>
</head>
<body>
<form action="upload.php" method="post" enctype="multipart/form-data">
<label for="file">文件名</label>
<input type="file" name="file" id="file"><br>
<input type="submit" value="提交">
</form>
</body>
</html>
3.upload.php
<?php //上传文件代码 //核心代码： /*if($_FILES['file']['error']>0){ echo '错误：'.$_FILES['file']['error'].'<br>'; }else{ echo '上传文件名：'.$_FILES['file']['name'].'<br>'; echo '文件名类型：'.$_FILES['file']['type'].'<br>'; echo '文件大小：'.($_FILES['file']['size']/1024).'kb<br>'; echo '文件临时存放地址：'.$_FILES['file']['tem_name']; }*/ //上传文件所需要的代码，但是在上传之前需要对文件进行判断限制，大小，类型等 //允许上海窜的图片后缀 $allowedExts = array("gif", "jpeg", "jpg", "png"); $temp = explode(".", $_FILES["file"]["name"]); //截取文件后缀 $extension = end($temp); //文件后缀 $type = $_FILES["file"]["type"]; $size = $_FILES["file"]["size"]; $error = $_FILES["file"]["error"]; $name = $_FILES["file"]["name"]; $tmp_name = $_FILES["file"]["tmp_name"]; if (($type == "image/gif") || ($type == "image/jpeg") || ($type == "image/jpg") || ($type == "image/pjpeg") || ($type == "image/x-png") || ($type == "image/png") && $size < 2048 && in_array($extension, $allowedExts) ) { if ($error > 0) { echo "错误：" . $error . '<br>'; } else { echo "文件名称：" . $name . "<br>"; echo "文件类型：" . $type . "<br>"; echo "文件大小：" . ($size / 1024) . "kb<br>"; echo "临时存放位置：" . $tmp_name; //判断存放文件的目录中是否存在该文件，如果没有，需要创建它，file的目录权限为777 if (file_exists("file/" . $name)) { echo $name . "文件已经存在。"; } else { move_uploaded_file($tmp_name, 'file/'. $name); echo "文件存储在：" . "file/". $name; } } } else { echo "非法文件"; }