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  • IntlChar::tolower()

    版本:php7

    (PHP 7)

    Make Unicode character lowercase

    说明

    publicstaticIntlChar::tolower(mixed $codepoint): mixed

    The given character is mapped to its lowercase equivalent. If the character has no lowercase equivalent, the original character itself is returned.

    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 the Simple_Lowercase_Mapping of the code point, if any; otherwise the code point itself.

    The return type will be integer unless the code point was passed as a UTF-8 string, in which case a string will be returned.

    范例

    Testing different code points

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

    以上例程会输出:

    string(1) "a"
    string(1) "a"
    string(2) "φ"
    string(2) "φ"
    string(1) "1"
    int(97)
    int(97)
    

    参见

    • IntlChar::totitle() Make Unicode character titlecase
    • IntlChar::toupper() Make Unicode character uppercase
    • mb_strtolower()使字符串小写