IntlChar::islower
(PHP 7, PHP 8)
IntlChar::islower — Check if code point is a lowercase letter
说明
Determines whether the specified code point has the general category "Ll" (lowercase letter).
注意:
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
示例 #1 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