IntlChar::isbase

(PHP 7, PHP 8)

IntlChar::isbase — Check if code point is a base character

说明

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

Determines whether the specified code point is a base character. true for general categories "L" (letters), "N" (numbers), "Mc" (spacing combining marks), and "Me" (enclosing marks).

注意:
This is different from the Unicode definition in chapter 3.5, conformance clause D13, which defines base characters to be all characters (not Cn) that do not graphically combine with preceding characters (M) and that are neither control (Cc) or format (Cf) characters.

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

Returns true if codepoint is a base character, false if not. Returns null on failure.

示例

示例 #1 Testing different code points

<?php
var_dump(IntlChar::isbase("A"));
var_dump(IntlChar::isbase("1"));
var_dump(IntlChar::isbase("\u{2603}"));
?>

以上示例会输出：

bool(true)
bool(true)
bool(false)

参见

IntlChar::isalpha() - Check if code point is a letter character
IntlChar::isdigit() - Check if code point is a digit character

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