php实现文件上传_php上传文件代码实例-优快云博客

本文链接：https://blog.youkuaiyun.com/t102526/article/details/124204145

这段内容涉及一个HTML页面和PHP脚本实现的简单文件上传功能。HTML表单允许用户选择文件，然后通过POST方法提交到upload.php。在PHP中，定义了一个UploadFile类，该类包含了检查文件类型、大小、路径的一系列方法，并尝试将上传的文件移动到指定目录。如果文件类型不在允许的列表中，文件过大或目标路径不存在，系统会显示错误消息。否则，文件上传成功。

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文件上传

1.upload.html


<html>
 <head>
  <meta charset="UTF-8">
  <title>文件上传</title>
 </head>
<form action='upload.php' method='post' enctype='multipart/form-data'>
请选择文件:<input type='file' name='myfile'>
<input type='submit' name='sub'>
</form>
</html>

2.upload.php

<html>
<head>
<meta charset="UTF-8">
<title>文件上传</title>
</head>
</html>
<?php
	class UploadFile{
		private $arr = array('png', 'jpg', 'gif');
		private $size = 100000;
		private $path = './upload/';
		
		private $fileName;
		private $newFileName;
		private $ftype;
		private $fsize;
		private $tempName;
		
		function __construct($file){
			$this -> fileName = $file['myfile']['name'];
			$this -> fsize = $file['myfile']['size'];
			$this -> tempName = $file['myfile']['tmp_name'];
			$this -> getFileType();
			$this -> getNewFileName();
		}
		
		private function getFileType(){
			@$fh = array_pop(explode('.', $this->fileName));
			$this -> ftype = $fh;
		}
		
		private function getNewFileName(){
			$newFileName = time() . rand(100,999) . '.' . $this->ftype;
			$this -> newFileName = $newFileName;
		}
		
		#判断后缀 checkFile()
		
		private function checkFile(){
			//$ft = array_pop(explode('.', $_FILES['myfile']['name']));
			if(!in_array($this->ftype,$this->arr)){
				die('文件类型错误，上传失败');
			
			}
		}
		
		#判断路径 checkPath()
		
		private function checkPath(){
			if(!file_exists($this->path)){
				mkdir($this->path);
			}
			
			
		}
		#判断大小 checkSize()
		
		private function checkSize(){
			if($this->fsize>$this->size){
				die('文件过大，上传失败');
			}
		}
		#共有方法 upload();
		function upload(){
			$this->checkFile();
			$this->checkPath();
			$this->checkSize();
			
			if(!@move_uploaded_file($this->tempName, $this->path . $this->newFileName)){
				die('文件上传失败');
			}echo '文件上传成功';
		
	}
	
	}
	
	
	
	
	$f=new UploadFile($_FILES);
	$f->upload();