Php/docs/intlchar.islower

• PHP Manual
• IntlChar
• Check if code point is a lowercase letter

IntlChar::islower

(PHP 7)

IntlChar::islower — Check if code point is a lowercase letter

说明

public static IntlChar::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 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 Ll lowercase letter, false if not.

范例

Example #1 Testing different code points

<?phpvar_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