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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PHP 7)
IntlChar::islower — Check if code point is a lowercase letter
$codepoint
)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() .
codepoint
The integer 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.
Example #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