February 12, 2011 
Definition:
function wp_check_filetype( $filename, $mimes = null ) {}
Retrieve the file type from the file name.
You can optionally define the mime array, if needed.
Parameters
- string $filename: File name or path.
- array $mimes: Optional. Key is the file extension with value as the mime type.
Return values
returns:Values with extension first and mime type.
Source code
function wp_check_filetype( $filename, $mimes = null ) {
if ( empty($mimes) )
$mimes = get_allowed_mime_types();
$type = false;
$ext = false;
foreach ( $mimes as $ext_preg => $mime_match ) {
$ext_preg = '!\.(' . $ext_preg . ')$!i';
if ( preg_match( $ext_preg, $filename, $ext_matches ) ) {
$type = $mime_match;
$ext = $ext_matches[1];
break;
}
}
return compact( 'ext', 'type' );
}
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