php文件操作的常用函数

写代码的猫叔

发布于：Oct 9, 2021

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删除几分钟前的文件

使用案例（删除几天前的日志文件）：

      $path =SYSTEM_PATH . DIRECTORY_SEPARATOR .'log';            
      $this->delete_file($path,$days*24*60);

函数：

protected function delete_file($dir,$time_minu)
{
    if(is_dir($dir)){
        if($dh=opendir($dir)){
    
            while (false !== ($file = readdir($dh))){
    
                if($file!="." && $file!=".."){
    
                    $fullpath=$dir."/".$file;
                    
                    if(!is_dir($fullpath)){                        
                        $filedate=filemtime($fullpath);    
                        $minutes=round((time()-$filedate)/60);
                        //删除文件
                        if($minutes>$time_minu){
                            unlink($fullpath);
                        }
    
                    }
                    else{
                        $this->delete_file($fullpath,$time_minu);
                    }
    
                }
    
            }
    
        }
        closedir($dh);
    }
}

常用函数

class File
{
  public static function mk_dir($dir)
  {
    $dir = rtrim($dir, '/') . '/';
    if (!is_dir($dir)) {
      if (mkdir($dir, 0700, true) == false) {
        return false;
      }
      return true;
    }
    return true;
  }
  public static function read_file($filename)
  {
    $content = '';
    if (function_exists('file_get_contents')) {
      @$content = file_get_contents($filename);
    } else {
      if (@$fp = fopen($filename, 'r')) {
        @$content = fread($fp, filesize($filename));
        @fclose($fp);
      }
    }
    return $content;
  }
  public static function write_file($filename, $writetext, $openmod = 'w')
  {
    if (@$fp = fopen($filename, $openmod)) {
      flock($fp, 2);
      fwrite($fp, $writetext);
      fclose($fp);
      return true;
    } else {
      return false;
    }
  }
  public static function del_dir($dirName)
  {
    if (!file_exists($dirName)) {
      return false;
    }
    $dir = opendir($dirName);
    while ($fileName = readdir($dir)) {
      $file = $dirName . DIRECTORY_SEPARATOR . $fileName;
      if ($fileName != '.' && $fileName != '..') {
        if (is_dir($file)) {
          self::del_dir($file);
        } else {
          unlink($file);
        }
      }
    }
    closedir($dir);
    return rmdir($dirName);
  }
  public static function copy_dir($surDir, $toDir)
  {
    $surDir = rtrim($surDir, '/') . '/';
    $toDir = rtrim($toDir, '/') . '/';
    if (!file_exists($surDir)) {
      return false;
    }
    if (!file_exists($toDir)) {
      self::mk_dir($toDir);
    }
    $file = opendir($surDir);
    while ($fileName = readdir($file)) {
      $file1 = $surDir . '/' . $fileName;
      $file2 = $toDir . '/' . $fileName;
      if ($fileName != '.' && $fileName != '..') {
        if (is_dir($file1)) {
          self::copy_dir($file1, $file2);
        } else {
          copy($file1, $file2);
        }
      }
    }
    closedir($file);
    return true;
  }
  public static function get_dirs($dir)
  {
    $dir = rtrim($dir, '/') . '/';
    $dirArray[][] = null;
    if (false != ($handle = opendir($dir))) {
      $i = 0;
      $j = 0;
      while (false !== ($file = readdir($handle))) {
        if (is_dir($dir . $file)) {
          $dirArray['dir'][$i] = $file;
          $i++;
        } else {
          $dirArray['file'][$j] = $file;
          $j++;
        }
      }
      closedir($handle);
    }
    return $dirArray;
  }
  public static function get_size($dir)
  {
    $dirlist = opendir($dir);
    $dirsize = 0;
    while (false !== ($folderorfile = readdir($dirlist))) {
      if ($folderorfile != "." && $folderorfile != "..") {
        if (is_dir("$dir/$folderorfile")) {
          $dirsize += self::get_size("$dir/$folderorfile");
        } else {
          $dirsize += filesize("$dir/$folderorfile");
        }
      }
    }
    closedir($dirlist);
    return $dirsize;
  }
  public static function empty_dir($dir)
  {
    return (($files = @scandir($dir)) && count($files) <= 2);
  }
  public function cache($name, $value = '', $path = DATA_PATH, $cached = true)
  {
    static $_cache = array();
    $filename = $path . $name . '.php';
    if ('' !== $value) {
      if (is_null($value)) {
        return false !== strpos($name, '*') ? array_map("unlink", glob($filename)) : unlink($filename);
      } else {
        $dir = dirname($filename);
        if (!is_dir($dir)) {
          mkdir($dir, 0755, true);
        }
        $_cache[$name] = $value;
        return file_put_contents($filename, strip_whitespace("<?php\treturn " . var_export($value, true) . ";?>"));
      }
    }
    if (isset($_cache[$name]) && $cached == true) {
      return $_cache[$name];
    }
    if (is_file($filename)) {
      $value = include $filename;
      $_cache[$name] = $value;
    } else {
      $value = false;
    }
    return $value;
  }
}

更新于：Oct 9, 2021