Get file suffix with PHP_PHP tutorial

PHP obtains the file suffix. There are many ways to obtain the file extension. Here are three methods for obtaining the file suffix. You can study it. The specific code will not be explained. Let’s just look at the code.
PHP obtains the file suffix. There are many ways to obtain the file extension. Here are three methods of obtaining the file suffix. You can study it. The specific code will not be explained. Let’s just look at the code.

//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];
}
?>
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 view this article. .

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