IntlChar::digit
(PHP 7, PHP 8)
IntlChar::digit — Get the decimal digit value of a code point for a given radix
Description
Returns the decimal digit value of the code point in the specified radix.
If the radix is not in the range 2<=radix<=36 or if the value of codepoint
is not a valid digit in the specified radix, false is returned.
A character is a valid digit if at least one of the following is true:
- The character has a decimal digit value. Such characters have the general category "Nd" (decimal digit numbers) and a Numeric_Type of Decimal. In this case the value is the character's decimal digit value.
- The character is one of the uppercase Latin letters 'A' through 'Z'. In this case the value is c-'A'+10.
- The character is one of the lowercase Latin letters 'a' through 'z'. In this case the value is ch-'a'+10.
- Latin letters from both the ASCII range (0061..007A, 0041..005A) as well as from the Fullwidth ASCII range (FF41..FF5A, FF21..FF3A) are recognized.
Liste de paramètres
-
codepoint -
La valeur codepoint de type entier (i.e.
0x2603pour U+2603 SNOWMAN), ou le caractère encodé en UTF-8 de type chaîne de caractères (i.e."\u{2603}") -
base -
The radix (defaults to
10).
Valeurs de retour
Returns the numeric value represented by the character in the specified radix,
or false if there is no value or if the value exceeds the radix. Returns null on failure.
Cette fonction peut retourner false, mais elle peut aussi retourner une valeur équivalent à false.
Veuillez lire la section sur les booléens pour plus d'informations.
Utilisez l'opérateur ===
pour tester la valeur de retour exacte de cette fonction.
Exemples
Exemple #1 Test de différents codepoint
<?php
var_dump(IntlChar::digit("0"));
var_dump(IntlChar::digit("3"));
var_dump(IntlChar::digit("A"));
var_dump(IntlChar::digit("A", 16));
?>L'exemple ci-dessus va afficher :
int(0) int(3) bool(false) int(10)
Voir aussi
- IntlChar::forDigit() - Get character representation for a given digit and radix
- IntlChar::charDigitValue() - Get the decimal digit value of a decimal digit character
- IntlChar::isdigit() - Check if code point is a digit character
IntlChar::PROPERTY_NUMERIC_TYPE
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