IntlChar::forDigit() function in PHP

The IntlChar::forDigit() function displays the character representation of a specified digit in the specified radix (number base). It returns the ASCII code of the character that represents the digit.

Syntax

IntlChar::forDigit(digit, radix)

Parameters

• digit − A number to convert to a character (0-35)

• radix − The radix (base) value. Must be between 2 and 36. Default is 10.

Return Value

The function returns the ASCII code (integer) of the character representation of the specified digit in the given radix. For digits 0-9, it returns ASCII codes 48-57 ('0'-'9'). For digits 10-35, it returns ASCII codes 97-122 ('a'-'z').

Example

The following example demonstrates basic usage ?

<?php
    // Digit 7 in base 10
    var_dump(IntlChar::forDigit(7));
    echo "<br>";
    
    // Digit 5 in base 16 (hexadecimal)
    var_dump(IntlChar::forDigit(5, 16));
    echo "<br>";
    
    // Digit 0 in base 10
    var_dump(IntlChar::forDigit(0));
    echo "<br>";
    
    // Digit 15 in base 16 (represents 'f')
    var_dump(IntlChar::forDigit(15, 16));
?>

int(55)
int(53)
int(48)
int(102)

Converting ASCII to Character

To see the actual character representation, you can use chr() function ?

<?php
    echo "Digit 7: " . chr(IntlChar::forDigit(7)) . "<br>";
    echo "Digit 15 in hex: " . chr(IntlChar::forDigit(15, 16)) . "<br>";
    echo "Digit 25 in base 36: " . chr(IntlChar::forDigit(25, 36)) . "<br>";
?>

Digit 7: 7
Digit 15 in hex: f
Digit 25 in base 36: p

Conclusion

IntlChar::forDigit() is useful for converting numeric digits to their character representations in different number bases. It returns ASCII codes that can be converted to actual characters using chr().