js is_valid_filename验证文件名的函数

函数代码

function is_valid_filename($name) 
{
 $parts = preg_split("/(\/|".preg_quote("\\").")/", $name);
 if (preg_match("/[a-z]:/i", $parts[0])) {
 unset($parts[0]);
 }
 foreach ($parts as $part) 
 {
 print "part = '$part'<br>";
 if (preg_match("/[".preg_quote("^|?*<\":>", "/")."\a\b\c\e\x\v\s]/", $part) || preg_match("/^(PRN|CON|AUX|CLOCK$|NUL|COMd|LPTd)$/im", 
 str_replace(".", "\n", $part))) {
 return false;
 }
 }
 return true;
}
$bad = array_merge(array_map('chr', range(0, 31)), array("<", ">", ":", '"', "/", "\\", "|", "?", "*"));
$result = str_replace($bad, "", $filename); 

windows 系统文件命名规则限制

https://msdn.microsoft.com/en-us/library/aa365247