Three ways to get file extension in PHP_PHP Tutorial

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Release: 2016-07-13 17:34:38
Original
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方法一:

function extend_1($file_name)
{
$retval="";
$pt=strrpos($file_name, ".");
if ($pt) $retval=substr($file_name, $pt+1, strlen($file_name) - $pt);
return ($retval);
}
?>


方法二:

function extend_2($file_name)
{
$extend = pathinfo($file_name);
$extend = strtolower($extend["extension"]);
return $extend;


方法三:

function extend_3($file_name)
{
$extend =explode("." , $file_name);
$va=count($extend)-1;
return $extend[$va];

 

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/508440.htmlTechArticle方法一: ?php function extend_1($file_name) { $retval=""; $pt=strrpos($file_name, "."); if ($pt) $retval=substr($file_name, $pt+1, strlen($file_name) - $pt); return ($retval);...
source:php.cn
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