PHP method for obtaining file extension (suffix)

This article will summarize how php gets the file extension, that is, the file suffix. Here, we only provide the most correct method to use php to obtain the file extension (file suffix. Functionget_extension ($ filename) {returnpathinfo ($ filename, PATHINFO_EXTENSION);} the php built-in function pathinfo is used in the function. The following describes the meaning and usage of this function: this article will summarize how php gets the file extension, that is, the file extension name. Here, we only provide the most correct method to use php to obtain 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: the definition and usage of pathinfo () function returns the file path information in an array.

Syntax

Pathinfo (path, options)

Parameters	Description
Path	Required. Specifies the path to be checked.
Process_sections	Optional. Specifies the array element to be returned. The default value is all. Possible values: PATHINFO_DIRNAME-returns only dirname PATHINFO_BASENAME-only return basename PATHINFO_EXTENSION-returns only extension

For example:

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

The following result is output:

Array (

[Dirname] =>/testweb
[Basename] => test.txt
[Extension] => txt
)