一个取得文件扩展名的php函数

<?
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
/*
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
GetFileType
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
用法：GetFiletype($filename)
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
*/
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
function GetFiletype($Filename) {
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
if (substr_count($Filename, ".") == 0) {        // 检查文件名中是否有.号。
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
return;                // 返回空
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
} else if (substr($Filename, -1) == ".") {        // 检查是否以.结尾，即无扩展名
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
return;                // 返回空
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
} else {
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
$FileType = strrchr ($Filename, ".");    // 从.号处切割
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
$FileType = substr($FileType, 1);    // 去除.号
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
return $FileType;            // 返回
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
}
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
}
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
$Filename = "Testfilename.php4";
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
$Filename = GetFileType($Filename);
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
echo $Filename;            // 　打印出php4
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn

wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
?>
wwww.chin aitpower.comJgkmXhZpetmBtRV3Om6dfHxDn
php爱好者站 http://www.phpfans.net PHP|MySQL|javascript|ajax|html.