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 )
Parameters: This function accepts a single parameter $codepoint which is mandatory. 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// PHP code to illustrate IntlChar::isupper()// function // Input data is character typevar_dump(IntlChar::isupper("G")); // Input data is control charactervar_dump(IntlChar::isupper("\t")); // Input data is string type var_dump(IntlChar::isupper("Geeksforneveropen")); // Input data is number typevar_dump(IntlChar::isupper("2018")); // Input data is single digitvar_dump(IntlChar::isupper("5"));?> |
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// PHP code to illustrate IntlChar::isupper() // Declare an array $arr$arr = array("A","\u{0041}","@","0","\n","123","Geeks");// \u{0041} is ASCII value of 'A'// Loop run for every array elementforeach ($arr as $val){ // Check each element as code point data var_dump(IntlChar::isupper($val));}?> |
Output:
bool(true) bool(true) bool(false) bool(false) bool(false) NULL NULL
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