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How to implement common file upload functions on web pages in php

coldplay.xixiforward: 2020-08-05 17:20:103230browse

Use php to implement common file upload functions on web pages for your reference. The specific content is as follows

Upload page

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Title</title>

</head>
<body>
<!--上传文件 enctype="multipart/form-data"指的是编码方式为上传多种类型文件和数据流-->

<form method="post" action="123.php" enctype="multipart/form-data">
 <input type="file" name="file">
 <input type="submit" value="上传">
</form>
</body>
</html>

File processing page

<?php
/**
 * Created by fcc
 * User: Administrator
 * Date: 2017/10/31
 * Time: 10:33
 */

var_dump($_FILES);
//文件处理要实现的几点
//1.是否有错误
//2.文件类型是否符合要求
//3.文件大小是否符合要求
//4.文件名是否重复
//$types = [&#39;image/jpeg&#39;,&#39;image/png&#39;];
if (!$_FILES[&#39;file&#39;][&#39;error&#39;]){
 if ($_FILES[&#39;file&#39;][&#39;type&#39;] == &#39;image/jpeg&#39;){
  if ($_FILES[&#39;file&#39;][&#39;size&#39;]<200000){
//文件传到文件夹中，可以拼接时间戳，用户名等防止文件名重复
   $file_name = "./upload/2017-10-31/".$_FILES[&#39;file&#39;][&#39;name&#39;];
   if (!file_exists($file_name)){
    move_uploaded_file($_FILES[&#39;file&#39;][&#39;tmp_name&#39;],$file_name);
//    $filename=iconv("UTF-8","",$file_name);
   }else{
    echo "文件名重复";
   }
  }else{
   echo "文件过大";
  }
 }else{
  echo "文件格式错误";
 }

}
//实验过程中出现因为图片汉字命名报错！！！

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