(PHP 4 >= 4.0.4, PHP 5, PHP 7)
ctype_lower — 锟斤拷小写锟街凤拷锟斤拷锟�
$text
) : bool
锟斤拷锟斤拷峁╋拷锟� string 锟斤拷 text
锟斤拷锟斤拷锟斤拷址锟斤拷遣锟斤拷嵌锟斤拷锟叫⌒达拷锟侥革拷锟�
text
锟斤拷要锟斤拷锟斤拷锟皆碉拷锟街凤拷锟斤拷锟斤拷
锟斤拷锟斤拷诘锟角帮拷锟斤拷锟斤拷曰锟斤拷锟斤拷锟� text
锟斤拷锟斤拷锟矫匡拷锟斤拷址锟斤拷锟斤拷锟叫⌒达拷锟侥革拷锟斤拷头锟斤拷锟� TRUE
锟斤拷锟斤拷之锟酵凤拷锟斤拷 FALSE
锟斤拷
Example #1 一锟斤拷 ctype_lower() 锟斤拷锟斤拷 (使锟斤拷默锟较碉拷锟斤拷锟皆伙拷锟斤拷)
<?php
$strings = array('aac123', 'qiutoas', 'QASsdks');
foreach ($strings as $testcase) {
if (ctype_lower($testcase)) {
echo "The string $testcase consists of all lowercase letters.\n";
} else {
echo "The string $testcase does not consist of all lowercase letters.\n";
}
}
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
The string aac123 does not consist of all lowercase letters. The string qiutoas consists of all lowercase letters. The string QASsdks does not consist of all lowercase letters.
Note:
锟斤拷锟斤拷锟斤拷锟揭伙拷锟� -128 锟斤拷 255 之锟斤拷(锟斤拷)锟斤拷锟斤拷锟斤拷, 锟斤拷锟结被锟斤拷锟斤拷为锟斤拷值锟斤拷应锟斤拷ASCII锟街凤拷 (锟斤拷值锟斤拷锟斤拷锟斤拷 256 锟斤拷支锟斤拷锟斤拷展ASCII锟街凤拷). 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟结被锟斤拷锟斤拷为锟斤拷值锟斤拷应锟斤拷十锟斤拷锟斤拷锟街凤拷锟斤拷.