ctype_lower
(PHP 4 >= 4.0.4, PHP 5)
ctype_lower -- Check for lowercase character(s)
说明
bool
ctype_lower
( string text )
Checks if all of the characters in the provided string,
text
, are lowercase letters.
返回值
Returns
TRUE
if every character in
text
is
a lowercase letter in the current locale.
范例
例子 1. A
ctype_lower()
example (using the default locale)
<?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
"
;
}
}
?>
|
上例将输出：
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.
|
|