The IntlChar::isupper() function is an inbuilt function in PHP which is used to check whether the given input character is an uppercase character or not.
Syntax:
bool IntlChar::isupper( $codepoint )
Paramters: This function accepts single parameter $codepoint which is mandotary. The input parameter is a character, which is encoded as a UTF-8 string.
Return Value: If $codepoint is an uppercase character then it returns True, otherwise return False.
Below programs illustrate the IntlChar::isupper() function in PHP:
Program 1:
<?php // PHP code to illustrate IntlChar::isupper() // function // Input data is character type var_dump(IntlChar::isupper("G")); echo "<br>"; // Input data is control character var_dump(IntlChar::isupper(" ")); echo "<br>"; // Input data is string type var_dump(IntlChar::isupper("Geeksforgeeks")); echo "<br>"; // Input data is number type var_dump(IntlChar::isupper("2018")); echo "<br>"; // Input data is single digit var_dump(IntlChar::isupper("5")); echo "<br>"; ?> |
Output:
bool(true) bool(false) NULL NULL bool(false)
Note: If String and Numbers (except single digit number) are used as a parameter then it returns NULL.
Program 2:
<?php // PHP code to illustrate isupper() // Declare an array $arr $arr = array("A","u{0041}","@","0","
","123","Geeks"); // u{0041} is ASCII value of 'A' // Loop run for every array element foreach ($arr as $val){ // Check each element as code point data var_dump(IntlChar::isupper($val)); echo "<br>"; } ?> |
Output:
bool(true) bool(true) bool(false) bool(false) bool(false) NULL NULL
Related Articles:
- PHP | IntlChar::isdigit() Function
- PHP | IntlChar::isalnum () Function
- PHP | IntlChar::isalpha() Function
Reference: http://php.net/manual/en/intlchar.isupper.php
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