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PHP | IntlChar::isupper() Function

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:

Reference: http://php.net/manual/en/intlchar.isupper.php



This article is attributed to GeeksforGeeks.org

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