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// PHP program to illustrate the IntlChar::foldCase() functionvar_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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