PHP | IntlChar foldCase() Function
Last Updated :
25 Mar, 2021
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 integer 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:
php
<?php
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));
?>
|
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
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