Get file extension program code in PHP_PHP tutorial

Sometimes we want to get the extension of the uploaded file in PHP. Below I will summarize the methods of obtaining the extension in PHP. Friends in need can refer to it.

Method 1, my best way to get extensions

The code is as follows

代码如下	复制代码
function extend_2($file_name) { $extend = pathinfo($file_name); $extend = strtolower($extend["extension"]); return $extend; }

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代码如下	复制代码
function get_extension($file) { return end(explode('.', $file)); }

function extend_2($file_name)

{
$extend = pathinfo($file_name);

$extend = strtolower($extend["extension"]);

代码如下	复制代码
function get_extension($file) { substr(strrchr($file, '.'), 1); }

return $extend;

}

Method 2, use the explode function and end function combination operation

The code is as follows

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function get_extension($file) { return end(explode('.', $file)); } Method three is the same as getting the extension in asp before.

The code is as follows

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function get_extension($file) { substr(strrchr($file, '.'), 1); } Well, there are only three methods, which basically satisfy you to obtain the file extension. http://www.bkjia.com/PHPjc/628928.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628928.htmlTechArticleSometimes we want to get the extension of the uploaded file in php. Below I will summarize how to get the extension in php. Summary of methods, friends in need can refer to it. Method 1, my best way to get...