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  • IntlChar::islower()

    版本:php7

    (PHP 7)

    Check if code point is a lowercase letter

    说明

    publicstaticIntlChar::islower(mixed $codepoint): bool

    Determines whether the specified code point has the general category "Ll"(lowercase letter).

    Note:

    This misses some characters that are also lowercase but have a different general category value. In order to include those, use IntlChar::isULowercase().

    参数

    $codepoint

    The integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")

    返回值

    Returns TRUE if$codepointis an Ll lowercase letter,FALSE if not.

    范例

    Testing different code points

    <?php
    var_dump(IntlChar::islower("A"));
    var_dump(IntlChar::islower("a"));
    var_dump(IntlChar::islower("Φ"));
    var_dump(IntlChar::islower("φ"));
    var_dump(IntlChar::islower("1"));
    ?>
    

    以上例程会输出:

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

    参见

    • IntlChar::isupper() Check if code point has the general category "Lu"(uppercase letter)
    • IntlChar::istitle() Check if code point is a titlecase letter
    • IntlChar::tolower() Make Unicode character lowercase
    • IntlChar::toupper() Make Unicode character uppercase
    • IntlChar::PROPERTY_LOWERCASE