php is_file 判斷是否為檔案

 

is_file — Tells whether the filename is a regular file

用法

 

bool is_file ( string $filename ) $file 為必選參數

來看一個測試is_file經典執行個體

<?php教程
var_dump(is_file('a_file.txt')) . " ";
var_dump(is_file('/usr/bin/')) . " ";
?>

輸也值

ture

false

用法二

<?php
function isfile($file){
    return preg_match('/^[^.^:^?^-][^:^?]*.(?i)' . getexts() . '$/',$file);
    //first character cannot be . : ? - subsequent characters can't be a : ?
    //then a . character and must end with one of your extentions
    //getexts() can be replaced with your extentions pattern
}

function getexts(){
    //list acceptable file extensions here
    return '(app|avi|doc|docx|exe|ico|mid|midi|mov|mp3|
                 mpg|mpeg|pdf|psd|qt|ra|ram|rm|rtf|txt|wav|word|xls)';
}

echo isfile('/Users/YourUserName/Sites/index.html');
?>

執行個體三

<?php
  function deletefolder($path)
  {
    if ($handle=opendir($path))
    {
      while (false!==($file=readdir($handle)))
      {
        if ($file<>"." AND $file<>"..")
        {
          if (is_file($path.'/'.$file))
          {
            @unlink($path.'/'.$file);
          }
          if (is_dir($path.'/'.$file))
          {
            deletefolder($path.'/'.$file);
            @rmdir($path.'/'.$file);
          }
        }
      }
    }
  }
?>
此函數刪除所有事情，定義的檔案夾：
工程與PHP 4和5。