IntlChar::digit
(PHP 7)
IntlChar::digit — Get the decimal digit value of a code point for a given radix
설명
public static int IntlChar::digit
( string $codepoint
[, int $radix = 10
] )
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.
인수
-
codepoint
-
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
-
radix
-
The radix (defaults to 10).
반환값
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.
Warning이 함수는 논리 FALSE를
반환하지만, 논리 FALSE로 취급할 수 있는 다른 값을 반환할 수 있습니다. 자세한 정보는 논리형 섹션을 참고하십시오.
이 함수의 반환값을 확인하려면
=== 연산자를
이용하십시오.
예제
Example #1 Testing different code points
<?php
var_dump(IntlChar::digit("0"));
var_dump(IntlChar::digit("3"));
var_dump(IntlChar::digit("A"));
var_dump(IntlChar::digit("A", 16));
?>
int(0)
int(3)
bool(false)
int(10)