IntlChar toupper() function in PHP

The IntlChar toupper()function converts the character into Unicode character uppercase.

Syntax

IntlChar::toupper (val)

Parameters

• val − An integer or character encoded as a UTF-8 string.

Return

The IntlChar toupper()function returns the converted uppercase character. If the character is already in uppercase, the same character is returned.

Example

The following is an example −

<?php
   var_dump(IntlChar::toupper("j"));
   echo "<br>";
   var_dump(IntlChar::toupper("89"));
   echo "<br>";
   var_dump(IntlChar::toupper("J"));
   echo "<br>";
   var_dump(IntlChar::toupper("jkl"));
?>

Output

The following is the output −

string(1) "J"
NULL
string(1) "J"
NULL