How does php obtain the file extension?

This article mainly introduces how php obtains the file extension, that is, the file extension method, to make a summary. If you are interested, you can refer to it.

This article mainly introduces how php obtains the file extension, that is, the file extension method, to make a summary. If you are interested, you can refer to it.

There are also a lot of similar methods on the Internet, but there are such a not rigorous problem, this article will not be analyzed one by one, here only gives the most correct use of php to get the file extension (File suffix).

Function get_extension ($ filename) {return pathinfo ($ filename, PATHINFO_EXTENSION );}

The php built-in function pathinfo is used in the function. The following describes the meaning and usage of this function:
Definition and usage
The pathinfo () function returns the file path information in an array.
Syntax
Pathinfo (path, options)

Note: pathinfo () returns an associated array containing path information. The array elements include the following values:
[Dirname]
[Basename]
[Extension]
For example:

<? Php print_r (pathinfo ("/testweb/test.txt");?>

The following result is output:

Array ([dirname] =>/testweb [basename] => test.txt [extension] => txt)

The above is the correct way to use php to obtain the file extension (File suffix). I hope you will like it and learn how to use it.