ctype_upper
(PHP 4 >= 4.0.4, PHP 5)
ctype_upper -- Check for uppercase character(s)
说明
bool
ctype_upper
( string text )
Checks if all of the characters in the provided string,
text
, are uppercase characters.
返回值
Returns
TRUE
if every character in
text
is
an uppercase letter in the current locale.
范例
例子 1. A
ctype_upper()
example (using the default locale)
<?php
$strings
= array(
'AKLWC139'
,
'LMNSDO'
,
'akwSKWsm'
);
foreach (
$strings
as
$testcase
) {
if (
ctype_upper
(
$testcase
)) {
echo
"The string $testcase consists of all uppercase letters.
\n
"
;
} else {
echo
"The string $testcase does not consist of all uppercase letters.
\n
"
;
}
}
?>
|
上例将输出：
The string AKLWC139 does not consist of all uppercase letters.
The string LMNSDO consists of all uppercase letters.
The string akwSKWsm does not consist of all uppercase letters.
|
|