PHP | IntlChar::forDigit() Function

The IntlChar::forDigit() function is an inbuilt function in PHP which is used to determines the character representation for a specific digit in the specified radix.

Syntax:

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

Parameters: This function accepts two parameters as mentioned above and described below:

• $digit: It is a required parameter. It is a number to convert to a character.
• $radix: It is optional parameter. Its default value is 10.

Return Value: It returns the character representation of specified digit in the specified 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.
• In Digit Case: digit < 10, then sum of '0' + digit is returned, otherwise 'a' + digit -10 is returned.

Below programs illustrate the IntlChar::forDigit() function in PHP:

Program 1:

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

// Input int codepoint value
var_dump(IntlChar::forDigit(0));

// Input int codepoint value
var_dump(IntlChar::forDigit(1));

//Input int codepoint value
var_dump(IntlChar::forDigit(10));

// Input int codepoint value
var_dump(IntlChar::forDigit(10, 2018));

// Input float codepoint value
var_dump(IntlChar::forDigit(20999.1811));

?>

Output:

int(48)
int(49)
int(0)
int(0)
int(0)

Program 2:

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

// Declare an array with
// different codepoint value
$arr = array("7",
            (50),
            "8",
            "0",

        );

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

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

Output:

int(55)
int(0)
int(56)
int(48)

Program 3: Below is the function implementation if pass the parameter symbol or character, then it gives an error.

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

//Input char codepoint value
var_dump(IntlChar::forDigit("Geeks"));

//Input char codepoint value
var_dump(IntlChar::forDigit("X"));

//Input control codepoint value
var_dump(IntlChar::forDigit("\n"));

//Input symbolic  codepoint value
var_dump(IntlChar::forDigit("@"));

?>

Output:

E_WARNING

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