IntlChar::isdigit

    (PHP 7, PHP 8)

    IntlChar::isdigit — Check if code point is a digit character

    说明

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

    Determines whether the specified code point is a digit character.

    true for characters with general category "Nd" (decimal digit numbers). Beginning with Unicode 4, this is the same as testing for the 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

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

    示例

    示例 #1 Testing different code points

    <?php
    var_dump    (IntlChar::isdigit("A"));
    var_dump(IntlChar::isdigit("1"));
    var_dump(IntlChar::isdigit("\t"));
    ?>

    以上示例会输出：

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

    参见

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