Php File Extension Method-PHP source code

Ec (2); the following lists three methods to obtain the file suffix. For more information about code, see. & Lt ;? Php tutorial Method 1: functionextend_1 ($ file_name) {$ retval & quot; $ ptstrrpos ($ file_name, & quot ;. & quot;); if ($ pt) $ retvalsubstr ($ file_name, $ pt script ec (2); script

The following lists three methods to obtain the file suffix. If you need code, you can refer to them.

// Method 1:
Function extend_1 ($ file_name)
{
$ Retval = "";
$ Pt = strrpos ($ file_name ,".");
If ($ pt) $ retval = substr ($ file_name, $ pt + 1, strlen ($ file_name)-$ pt );
Return ($ retval );
}
// Method 2
Function extend_2 ($ file_name)
{
$ Extend = pathinfo ($ file_name );
$ Extend = strtolower ($ extend ["extension"]);
Return $ extend;
}
// Method 3
Function extend_3 ($ file_name)
{
$ Extend = explode (".", $ file_name );
$ Va = count ($ extend)-1;
Return $ extend [$ va];
}
?>