PHP - Manual: IntlChar::islower
2024-11-14
(PHP 7, PHP 8)
IntlChar::islower — Check if code point is a lowercase letter
$codepoint
): ?boolDetermines 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().
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}"
)
Returns true
if
codepoint
is an Ll lowercase letter, false
if not. Returns null
on failure.
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)
IntlChar::PROPERTY_LOWERCASE