PHP中is_file()函数使用指南_PHP教程

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var_dump(is_file('a_file.txt')) . "\n";

var_dump(is_file('/usr/bin/')) . "\n";

?>

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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');

?>

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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);

}

}

}

}

}

?>