PHP | IntlChar digit() function

int IntlChar::digit( $codepoint, $radix )

• $codepoint: The value of $codepoint is an integer or character, which is encoded as a UTF-8 string.
• $radix: It is optional parameter. Its default value is 10.

• If both $radix or $digit is not valid then return NULL.
• The $radix argument is valid if its value lies between $radix >= 2 and $radix <= 36.
• The digit is valid if its value is 0 <= digit < radix.
• The character has a decimal digit value. This characters comes under general category Nd(decimal digit numbers) and a Numeric_Type of Decimal.
• The character is uppercase Latin letters in between 'A' to 'Z'. Then the value of character is c-'A'+10.
• The character is lowercase Latin letters in between 'a' to 'z'. Then the value of character is ch-'a'+10.
• Latin letters from both the ASCII range (0061..007A, 0041..005A) as well as from the Full width ASCII range (FF41..FF5A, FF21..FF3A) are recognized.

<?php

// PHP code to illustrate IntlChar::digit()
// function

// Input data is single digit
var_dump(IntlChar::digit("6"));

// Input data is single digit
var_dump(IntlChar::digit("3"));

// Input data is character type
var_dump(IntlChar::digit("A"));

// // Input data is character type with base
var_dump(IntlChar::digit("P", 16));

// // Input data is character type with base
var_dump(IntlChar::digit("9", 2));
?>

int(6)
int(3)
bool(false)
bool(false)
bool(false)

<?php
// PHP code to illustrate IntlChar::digit()
    
// Declare an array $arr
$arr = array("G", "GeeksforGeeks", "^", "1001", "6", "\n",
                                             "\n\n", "\t");
   
// Loop run for every array element
foreach ($arr as $val){
       
    // Check each element as code point data
    var_dump(IntlChar::digit($val));
}
?>

bool(false)
NULL
bool(false)
NULL
int(6)
bool(false)
NULL
bool(false)

• PHP | IntlChar::isdigit() Function
• PHP | IntlChar::forDigit() Function
• PHP | IntlChar::charDigitValue() Function