PHP is_uploaded_file () function
Definition and Usage
is_uploaded_file () function checks whether the specified file is uploaded via HTTP POST.
If the file is uploaded via HTTP POST, the function returns TRUE.
grammar
is_uploaded_file(file)
参数 | 描述 |
---|---|
file | 必需。规定要检查的文件。 |
Tips and Notes
Note: The results of this function are cached.Use clearstatcache () to clear the cache.
Examples
<?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");
}
?>
The code above will output:
test.txt is not uploaded via HTTP POST
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