PHP | IntlChar foldCase() Function

The IntlChar::foldCase() function is an inbuilt function in PHP which is used to perform case folding on a code point. Case folding means the given character is mapped to its equivalent lowercase characters.

Syntax:

mixed IntlChar::foldCase( $codepoint, $options = 
IntlChar::FOLD_CASE_DEFAULT )

Parameters: This function accepts two parameters as mentioned above and described below:



  • $codepoint: This parameter is a character or interger value, which is encoded as a UTF-8 string.
  • $options: This parameter holds the character constants IntlChar::FOLD_CASE_DEFAULT by default or IntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I.

Return Value: This function returns Simple_Case_Folding of the codepoint. If the codepoint has no case folding equivalent, then the codepoint itself is returned.

Below program illustrates the IntlChar::foldCase() function in PHP:

Program:

filter_none

edit
close

play_arrow

link
brightness_4
code

<?php
// PHP program to illustrate the IntlChar::foldCase() function
  
var_dump(IntlChar::foldCase('AA', IntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I));
  
var_dump(IntlChar::foldCase('@', IntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I));
  
var_dump(IntlChar::foldCase('&', IntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I));
  
var_dump(IntlChar::foldCase('C', IntlChar::FOLD_CASE_DEFAULT));
  
var_dump(IntlChar::foldCase('Lt', IntlChar::FOLD_CASE_DEFAULT));
  
var_dump(IntlChar::foldCase('/', IntlChar::FOLD_CASE_DEFAULT));
  
var_dump(IntlChar::foldCase('g', IntlChar::FOLD_CASE_DEFAULT));
  
var_dump(IntlChar::foldCase('1', IntlChar::FOLD_CASE_DEFAULT));
  
?>

chevron_right


Output:

NULL
string(1) "@"
string(1) "&"
string(1) "c"
NULL
string(1) "/"
string(1) "g"
string(1) "1"

Reference: https://www.php.net/manual/en/intlchar.foldcase.php



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :
Practice Tags :


1


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.