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    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.

    示例

    示例 #1 Testing different code points

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

    以上示例会输出：

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

    参见

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