IntlChar::isalnum

(PHP 7, PHP 8)

IntlChar::isalnum — Check if code point is an alphanumeric character

说明

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

Determines whether the specified code point is an alphanumeric character (letter or digit). true for characters with general categories "L" (letters) and "Nd" (decimal digit numbers).

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 an alphanumeric character, false if not. Returns null on failure.

范例

示例 #1 Testing different code points

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

以上例程会输出：

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

参见