The Right Way to Get a File Extension in PHP
I made a recent search on retrieving file extensions in PHP.
I found out that a lot have been re-inventing the wheel. They have been creating code for functionality that PHP already has. This is one example of re-inventing the wheel
function get_file_extension($file_name)
{
return substr(strrchr($file_name,'.'),1);
}
Another example was this:
function file_extension($filename)
{
return end(explode(".", $filename));
}
PHP already has a function that does the same thing and more.
Welcome, pathinfo.
<?php
$file_path = pathinfo('/www/htdocs/your_image.jpg');
echo "$file_path ['dirname']\n";
echo "$file_path ['basename']\n";
echo "$file_path ['extension']\n";
echo "$file_path ['filename']\n"; // only in PHP 5.2+
?>
// Output
/www/htdocs
your_image.jpg
jpg
your_image
A much easier way to use the constants:
[PATHINFO_DIRNAME | PATHINFO_BASENAME | PATHINFO_EXTENSION | PATHINFO_FILENAME]- PATHINFO_DIRNAME - the directory
- PATHINFO_BASENAME - the file name
- PATHINFO_EXTENSION - the extension
- PATHINFO_FILENAME - the filename without the extension
echo pathinfo('/www/htdocs/your_image.jpg', PATHINFO_EXTENSION);
// Output
jpg
If you're reading this now, please, spread the word.
Categories: How To, Web Development
Tags: php
No Comments
