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PHP | IntlChar digit() function

Last Updated : 27 Aug, 2019
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The IntlChar::digit() function is an inbuilt function in PHP which is used to get the decimal digit value of a code point for a given radix. This function returns the decimal digit value of the code point in the specified radix. Syntax:
int IntlChar::digit( $codepoint, $radix )
Parameters: This function accepts two parameters as mentioned above and described below:
  • $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.
Return Value: This function returns the number represented by the character in the given radix, or False if there is no value or if the value exceeds the radix. Note: Valid and invalid function argument:
  • 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.
Below programs illustrate the IntlChar::digit() function in PHP: Program 1: php
<?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));
?>
Output:
int(6)
int(3)
bool(false)
bool(false)
bool(false)
Program 2: php
<?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));
}
?>
Output:
bool(false)
NULL
bool(false)
NULL
int(6)
bool(false)
NULL
bool(false)
Related Articles: Reference: http://php.net/manual/en/intlchar.digit.php

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