PHP 中实现Laravel 上传图片、文件等类封装详解

<?php 
/** 
 * Created by PhpStorm. 
 * User: wady www.bcty365.com 
 * Date: 2017/8/16 
 * Time: 14:52 
 */ 
namespace App\ThinkClass; 
use Symfony\Component\HttpFoundation\File\UploadedFile; 
class UploadClass 
{ 
  /** 
   * @var UploadedFile $file; 
   */ 
  protected $file; 
  /** 
   * 上传错误信息 
   * @var string 
   */ 
  private $error = &#39;&#39;; //上传错误信息 
  private $fullPath=&#39;&#39;;//绝对地址 
  private $config = array( 
    &#39;maxSize&#39;    => 3*1024*1024, //上传的文件大小限制 (0-不做限制) 
    &#39;exts&#39;     => array(&#39;jpg&#39;,&#39;jpeg&#39;,&#39;gif&#39;,&#39;png&#39;,&#39;doc&#39;,&#39;docx&#39;,&#39;xls&#39;,&#39;xlsx&#39;,&#39;ppt&#39;,&#39;pptx&#39;,&#39;pdf&#39;,&#39;rar&#39;,&#39;zip&#39;), //允许上传的文件后缀 
    &#39;subName&#39;    => &#39;&#39;, //子目录创建方式，[0]-函数名，[1]-参数，多个参数使用数组 
    &#39;rootPath&#39;   => &#39;/uploads/&#39;, //保存根路径 
    &#39;savePath&#39;   => &#39;&#39;, //保存路径 
    &#39;thumb&#39;     => array(),//是裁剪压缩比例 
  ); 
  public function __construct($config = array()){ 
    /* 获取配置 */ 
    $this->config  =  array_merge($this->config, $config); 
    if(!emptyempty($this->config[&#39;exts&#39;])){ 
      if (is_string($this->exts)){ 
        $this->config[&#39;exts&#39;] = explode(&#39;,&#39;, $this->exts); 
      } 
      $this->config[&#39;exts&#39;] = array_map(&#39;strtolower&#39;, $this->exts); 
    } 
    $this->config[&#39;subName&#39;] = $this->subName ? ltrim($this->subName,&#39;/&#39;) : &#39;/&#39;.date(&#39;Ymd&#39;); 
    $this->fullPath = rtrim(public_path(),&#39;/&#39;).$this->config[&#39;rootPath&#39;]; 
  } 
  public function __get($name) { 
    return $this->config[$name]; 
  } 
  public function __set($name,$value){ 
    if(isset($this->config[$name])) { 
      $this->config[$name] = $value; 
    } 
  } 
  public function __isset($name){ 
    return isset($this->config[$name]); 
  } 
  /** 
   * 获取最后一次上传错误信息 
   * @return string 错误信息 
   */ 
  public function getError(){ 
    return $this->error; 
  } 
  public function upload($file){ 
     if(emptyempty($file)){ 
       $this->error = &#39;没有上传的文件&#39;; 
       return false; 
     } 
     if(!$this->checkRootPath($this->fullPath)){ 
       $this->error = $this->getError(); 
       return false; 
     } 
     $fileSavePath=$this->fullPath.$this->savePath.$this->subName; 
     if(!$this->checkSavePath($fileSavePath)){ 
       $this->error = $this->getError(); 
       return false; 
     } 
     $files =array(); 
     if(!is_array($file)){ 
       //如果不是数组转成数组 
       $files[]=$file; 
     }else{ 
       $files=$file; 
     } 
    $info  = array(); 
     $imgThumb = new \App\ThinkClass\ThumbClass(); 
     foreach ($files as $key=>$f){ 
       $this->file=$f; 
        $f->ext = strtolower($f->getClientOriginalExtension()); 
       /*文件上传检查*/ 
       if (!$this->check($f)){ 
         continue; 
       } 
       $fileName = str_random(12).&#39;.&#39;.$f->ext; 
       /* 保存文件 并记录保存成功的文件 */ 
       if ($this->file->move($fileSavePath,$fileName)) { 
         /*图片按照宽高比例压缩*/ 
         \Log::notice($fileSavePath.$fileName); 
         if(!emptyempty($this->thumb) && is_array($this->thumb)){ 
           $imgThumb ->thumb($this->thumb,$fileSavePath.&#39;/&#39;.$fileName); 
         } 
         $info[]=$this->rootPath.$this->savePath.$this->subName.&#39;/&#39;.$fileName; 
       } 
     } 
     return is_array($info) ? $info : false; 
  } 
  /** 
   * 检测上传根目录 
   * @param string $rootpath  根目录 
   * @return boolean true-检测通过，false-检测失败 
   */ 
  protected function checkRootPath($rootpath){ 
    if(!(is_dir($rootpath) && is_writable($rootpath))){ 
      $this->error = &#39;上传根目录不存在！&#39;; 
      return false; 
    } 
    return true; 
  } 
  /** 
   * 检测上传目录 
   * @param string $savepath 上传目录 
   * @return boolean     检测结果，true-通过，false-失败 
   */ 
  public function checkSavePath($savepath){ 
    /* 检测并创建目录 */ 
    if (!$this->mkdir($savepath )) { 
      return false; 
    } else { 
      /* 检测目录是否可写 */ 
      if (!is_writable($savepath)) { 
        $this->error = &#39;上传目录不可写！&#39;; 
        return false; 
      } else { 
        return true; 
      } 
    } 
  } 
  /** 
   * 检查上传的文件 
   * @param array $file 文件信息 
   */ 
  private function check($file) { 
    /* 检查文件大小 */ 
    if (!$this->checkSize($file->getSize())) { 
      $this->error = &#39;上传文件大小不符！&#39;; 
      return false; 
    } 
    /* 检查文件后缀 */ 
    if (!$this->checkExt($file->ext)) { 
      $this->error = &#39;上传文件后缀不允许&#39;; 
      return false; 
    } 
    /* 通过检测 */ 
    return true; 
  } 
  /** 
   * 检查文件大小是否合法 
   * @param integer $size 数据 
   */ 
  private function checkSize($size) { 
    return !($size > $this->maxSize) || (0 == $this->maxSize); 
  } 
  /** 
   * 检查上传的文件后缀是否合法 
   * @param string $ext 后缀 
   */ 
  private function checkExt($ext) { 
    return emptyempty($this->config[&#39;exts&#39;]) ? true : in_array(strtolower($ext), $this->exts); 
  } 
  /** 
   * 创建目录 
   * @param string $savepath 要创建的穆里 
   * @return boolean     创建状态，true-成功，false-失败 
   */ 
  protected function mkdir($savepath){ 
    if(is_dir($savepath)){ 
      return true; 
    } 
    if(mkdir($savepath, 0777, true)){ 
      return true; 
    } else { 
      $this->error = "目录创建失败"; 
      return false; 
    } 
  } 
}

$upload = new UploadClass(); 
$upload->exts=array('jpg','png'); 
$upload->maxSize=5*1024*1024; 
$upload->savePath='course/uid_6'; 
$file = $request->file('fileImg'); 
$aa = $upload->upload($file); 
dd($aa);