IntlChar::islower()
版本:php7
(PHP 7)
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
- $codepoint
The integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")
返回值
Returns TRUE
if$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