6 ways to get the extension of a file in PHP_PHP Tutorial

Yesterday, a friend and I mentioned in the PHP exchange group (276167802, verification: csl, if you are interested, you can join and discuss together) PHP 6 ways to get the extension of a file, now I will share it with everyone Share it:

1. Methods of searching and intercepting strings

$extension=substr(strrchr($file, '.'), 1);

2. Method 2 for searching and intercepting strings

$extension=substr($file, strrpos($file, '.')+1);

3. Method of array segmentation

$extension=end(explode('.', $file));

4. Use pathinfo to directly parse

$info = pathinfo($file);
$extension=$info['extension'];

5. Use the second parameter of pathinfo

$extension=pathinfo($file, PATHINFO_EXTENSION);

6. Use finfo_file function

$finfo = finfo_open(FILEINFO_MIME_TYPE);
$extension = finfo_file($finfo, $file) ;
echo $extension;
finfo_close($finfo);

http://www.bkjia.com/PHPjc/621640.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/621640.htmlTechArticleYesterday, I was in the PHP exchange group (276167802, verification: csl) with a friend. If you are interested, you can join and discuss ) mentioned 6 ways to get the file extension in PHP, now take out...