Three functions for obtaining file extension name in PHP_PHP tutorial

Choose one and remember it. You can use it directly when you need to use it in the future, or you can come to this site to read this article.

Copy code The code is as follows:

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

//Method 2
function extend_2($file_name)
{
$extend = pathinfo($file_name);
$extend = strtolower($extend["extension"]);
return $extend;
}

//Method 3
function extend_3($file_name)
{
$extend =explode("." , $file_name);
$va=count($extend)-1;
return $extend[$ va];
}
?>

http://www.bkjia.com/PHPjc/326038.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/326038.htmlTechArticleChoose one and remember it. You can use it directly when you need to use it in the future, or you can come to this site to view this article. Yes. Copy the code The code is as follows: ?php //Method 1: function extend_1(...