IntlChar::isalpha

(PHP 7, PHP 8)

IntlChar::isalpha — Check if code point is a letter character

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

Determines whether the specified code point is a letter character. true for general categories "L" (letters).

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}")

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

示例 #1 Testing different code points

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

以上示例会输出：

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