PHP文件上传函数封装

作业标题：PHP文件上传函数封装
作业内容：根据需求封装文件上传限制函数: 1. 文件大小不超过5M 2. 后缀只能是[‘jpg’,’jpeg’,’png’,’wbmp’,’gif’] 3. 检查图片合法性 4.为每一张图片处理散列名称 5. 目标目录不存在,创建目录 6.设置错误日志接收系统错误,而不是将错误显示到页面上

首页demo1.php代码

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>文件上传</title>
</head>
<body>
  <!-- application/x-www-urlencoded 不合适二进制数据或者包含ASCII字符的传输 -->
  <form action="upload3.php" method="post" enctype="multipart/form-data">
      <!-- <fieldset>
          <legend>
              单文件上传
          </legend>
          <label for="my_file"></label>
          <input type="file" name="my_file" id="my_file">
          <button>上传</button>
      </fieldset>  -->
      <fieldset>
          <legend>
              多文件上传
          </legend>
          <label for="my_file"></label>
          <input type="file" name="my_file[]" id="my_file" multiple>
          <button>上传</button>
      </fieldset>
  </form>
</body>
</html>

upload代码

<?php
 ini_set('display_errors','Off');        //页面不现实任何错误
 ini_set('error_log','./error.log');  
require 'common1.php';
$files = upload($_FILES['my_file']);
foreach ($files as $fileInfo)
{
    $res = uploadFile($fileInfo);
    echo "<p>{$res['info']}</p>";
    echo "<img style='border-radius:50%;width:100px';height:50% src='{$res['fileRealPath']}'>";
    $uploadFiles[] = $res['fileRealPath'];
}
printf('<pre>%s</pre>',print_r($uploadFiles,true));
echo json_encode($uploadFiles);

封装函数common.php

<?php
ini_set('display_errors','Off');        //页面不现实任何错误
ini_set('error_log','./error.log');  
//文件上传函数
function uploadFile($fileInfo,$uploadPath='./storage',$flag=true,$allowExt=['jpg','png','wbmp','gif','jpeg'],$maxSize=5242880)
{
    if($fileInfo['error'] == 0)
    {
        // 后端设置文件的类型
        $arr = explode('.',$fileInfo['name']);
        $ext = end($arr);
        $prefix = array_shift($arr);
        if(!in_array($ext,$allowExt))
        {
            $res['error']='非法的文件类型';
        }
        if($fileInfo['size'] > $maxSize)
        {
            $res['error']='文件大小超过限制的最大值';
        }
        if($flag)
        {
            //检测图片是否合法
            if(!getimageSize($fileInfo['tmp_name']))
            {
                $res['error']='不是真实图片,get out~';
            }
        }
        if(!is_uploaded_file($fileInfo['tmp_name']))
        {
            $res['error'] ='上传方式错误:请使用http post方式上传';
        }
        if(!empty($res))  return;
        // -----------------------------------------------------------------------
        // copy(),move_uploaded_file()可以将文件从临时目录移动到指定路径
        if(!file_exists($uploadPath))
        {
            mkdir($uploadPath,0770,true);
            chmod($uploadPath,0770);
        }
        // 根据$prefix time() 生成唯一图片地址
        $des = $uploadPath.'/'.md5($prefix.time()).'.'.$ext;
        $result = move_uploaded_file($fileInfo['tmp_name'],$des);
        if(!$result)
        {
            $res['error'] = '文件移动失败';
        }else{
            $res['info'] = $fileInfo['name'] . '上传成功';
            $res['fileRealPath'] =  $des;
        }
        return $res;
    }else{
        switch($error) :
            case 1:
              $res['error'] = '文件超过`php.ini`中`upload_max_filesize`值<br>';
            break;
            case 2:
                $res['error'] =  '文件大小超过表单中`MAX_FILE_SIZE`指定的值<br>';
            break;
            case 3:
                $res['error'] = '文件只有部分被上传<br>';
            break;
            case 4:
                $res['error'] = '没有文件被上传<br>';
            break;
            case 6:
                $res['error'] =  '找不到临时文件夹<br>';
            break;
            case 6:
                $res['error'] =  '文件写入失败<br>';
            break;
            default:
                $res['error'] = '系统错误<br>';
            break;
        endswitch;
        return $res;
    }
}
function upload($fileInfo)
{
    foreach($fileInfo as $k=>$v)
    {
        foreach($v as $kk=>$vv)
        {
            if($kk == $kk )
            {
                $files[$kk][$k]  = $vv;
            }
        }
    }
    return $files;
}