IntlChar::charDigitValue

(PHP 7, PHP 8)

IntlChar::charDigitValue — Get the decimal digit value of a decimal digit character

说明

public static IntlChar::charDigitValue(int|string $codepoint): ?int

Returns the decimal digit value of a decimal digit character.

Such characters have the general category "Nd" (decimal digit numbers) and a Numeric_Type of Decimal.

参数

codepoint

The int codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")

返回值

The decimal digit value of codepoint, or -1 if it is not a decimal digit character. Returns null on failure.

范例

示例 #1 Testing different code points

<?php
var_dump(IntlChar::charDigitValue("1"));
var_dump(IntlChar::charDigitValue("\u{0662}"));
var_dump(IntlChar::charDigitValue("\u{0E53}"));
?>

以上例程会输出：

int(1)
int(2)
int(3)

参见