PHP | IntlChar::charDigitValue() Function

The IntlChar::charDigitValue() function is an inbuilt function in PHP which is used to return the decimal digit value from a decimal digit character. Where the general category decimal digit numbers and “Nd” is Numeric_Type of Decimal.
Syntax:

int IntlChar::charDigitValue( $codepoint )

Parameters: This function accepts a single parameter $codepoint which is mandatory. The input parameter is a character or integer value, which is encoded as a UTF-8 string.
Return Value: If $codepoint is decimal digit value then returns True otherwise return -1. 
Below programs illustrate the IntlChar::charDigitValue() Function in PHP.
Program 1:

php

<?php
// PHP code to illustrate IntlChar::charDigitValue
// function

//Input int codepoint value
var_dump(IntlChar::charDigitValue("\u{2025}"));
echo "<br>";

//Input character codepoint value
var_dump(IntlChar::charDigitValue("2345"));
echo "<br>";

//Input int codepoint value
var_dump(IntlChar::charDigitValue("\u{0774}"));
echo "<br>";

//Input int codepoint value
var_dump(IntlChar::charDigitValue("2"));
echo "<br>";

//Input character codepoint value
var_dump(IntlChar::charDigitValue("Geeks"));
echo "<br>";

//Input character codepoint value
var_dump(IntlChar::charDigitValue("\u{0E66}"));
echo "<br>";

//Input Empty codepoint value
var_dump(IntlChar::charDigitValue(" "));

?>

Output:

int(-1) 
NULL
int(-1) 
int(2) 
NULL 
int(-1) 
int(-1)

Program 2:

php

<?php
// PHP code to illustrate
// IntlChar::charDigitValue() function

// Declare an array $arr
$arr = array("^", "2345", "6", "\n");

// Loop run for every array element
foreach ($arr as $val){

    // Check each element as code point data
    var_dump(IntlChar::charDigitValue($val));
    echo "<br>";
}
?>

Output:

int(-1)
NULL
int(6)
int(-1)

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