PHP 教程
PHP is_uploaded_file() 函數(shù)
完整的 PHP Filesystem 參考手冊定義和用法
is_uploaded_file() 函數(shù)檢查指定的文件是否是通過 HTTP POST 上傳的。
如果文件是通過 HTTP POST 上傳的，該函數(shù)返回 TRUE。
語法
is_uploaded_file(file)
| 參數(shù) | 描述 |
|---|---|
| file | 必需。規(guī)定要檢查的文件。 |
提示和注釋
注釋：該函數(shù)的結果會被緩存。請使用 clearstatcache() 來清除緩存。
實例
<?php
$file = "test.txt";
if(is_uploaded_file($file))
{
echo ("$file is uploaded via HTTP POST");
}
else
{
echo ("$file is not uploaded via HTTP POST");
}
?>
$file = "test.txt";
if(is_uploaded_file($file))
{
echo ("$file is uploaded via HTTP POST");
}
else
{
echo ("$file is not uploaded via HTTP POST");
}
?>
上面的代碼將輸出：
test.txt is not uploaded via HTTP POST
完整的 PHP Filesystem 參考手冊其他擴展