PHP | IntlChar istitle() Function

The IntlChar::istitle function is an inbuilt function in PHP which is used to check whether the input character code point is a titlecase letter or not. In True cases, the characters with the general category are “Lt” (titlecase letter).
Syntax:

bool IntlChar::istitle( $codepoint )

Parameters: This function accepts a single parameter $codepoint which is mandatory. The input parameter $codepoint is a character or integer value, which is encoded as a UTF-8 string.
Return Value: Returns True, if $codepoint is a titlecase letter, otherwise return False.
Below programs illustrate the IntlChar::istitle() Function in PHP:
Program 1:

php

<?php
// PHP function to illustrate the
//use of IntlChar::istitle()

// Input Capital letter  codepoint
var_dump(IntlChar::istitle("Welcome to Geeks"));

// Input Capital letter  codepoint
var_dump(IntlChar::istitle("\u{03A6}"));

// Input Capital letter  codepoint
var_dump(IntlChar::istitle("?"));

// Input int char an identifier
// of codepoint value
var_dump(IntlChar::istitle("\u{00A0}"));

// Input symbolic space codepoint value
var_dump(IntlChar::istitle(" "));

// Input symbolic codepoint value
var_dump(IntlChar::istitle(" ^ "));

// Input int codepoint value
var_dump(IntlChar::istitle("3"));

?>

Output:

NULL
bool(false)
bool(false)
bool(false)
bool(false)
NULL
bool(false)

Program 2:

php

<?php
// PHP function to illustrate the
// use of IntlChar::istitle()

// Declare an array with
// different codepoint value
$arr = array("G",
             "\u{03C6}",
             "\t",
        );

// For loop condition to check
// each character through function
foreach ($arr as $val) {

    // Check each element as code point data
    var_dump(IntlChar::istitle($val));
}
?>

Output:

bool(false)
bool(false)
bool(false)

Reference: https://www.php.net/manual/en/intlchar.istitle.php