Home > php教程 > php手册 > 一个取得文件扩展名的函数(不过函数名叫做取得FILETYPE呢!呵呵!)

一个取得文件扩展名的函数(不过函数名叫做取得FILETYPE呢!呵呵!)

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Release: 2016-05-26 08:19:38
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<?php
/*
GetFileType 
用法:GetFiletype($filename)
*/ 
function GetFiletype($Filename) { 
    if (substr_count($Filename, ".") == 0) {        // 检查文件名中是否有.号。
        return;           // 返回空
    } else if (substr($Filename, -1) == ".") {        // 检查是否以.结尾,即无扩展名 
        return;           // 返回空 
    } else { 
        $FileType = strrchr ($Filename, ".");    // 从.号处切割
        $FileType = substr($FileType, 1);    // 去除.号 
        return $FileType;       // 返回 
    } 
} 
$Filename = "Testfilename.php4"; 
$Filename = GetFileType($Filename); 
echo $Filename;       //  打印出php4 
?>
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