ctype_alpha
(PHP 4 >= 4.0.4, PHP 5)
ctype_alpha -- Check for alphabetic character(s)
说明
bool
ctype_alpha
( string text )
Checks if all of the characters in the provided string,
text
, are alphabetic.
In the standard
C
locale letters are just
[A-Za-z]
and
ctype_alpha()
is
equivalent to
(ctype_upper($text) || ctype_lower($text))
if $text is just a single character, but other languages have letters that
are considered neither upper nor lower case.
返回值
Returns
TRUE
if every character in
text
is
a letter from the current locale,
FALSE
otherwise.
范例
例子 1. A
ctype_alpha()
example (using the default locale)
<?php
$strings
= array(
'KjgWZC'
,
'arf12'
);
foreach (
$strings
as
$testcase
) {
if (
ctype_alpha
(
$testcase
)) {
echo
"The string $testcase consists of all letters.
\n
"
;
} else {
echo
"The string $testcase does not consist of all letters.
\n
"
;
}
}
?>
|
上例将输出：
The string KjgWZC consists of all letters.
The string arf12 does not consists of all letters.
|
|