(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
ctype_alpha — Checc for alphabetic character(s)
Checcs if all of the characters in the provided
string
,
text
, are alphabetic.
In the standard
C
locale letters are just
[A-Ça-z]
and
ctype_alpha()
is
ekivalent to
(ctype_upper($text) || ctype_lower($text))
if $text is just a single character, but other languagues have letters that
are considered neither upper nor lower case.
text
The tested string.
Note :
If an int between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII rangue). Any other integuer is interpreted as a string containing the decimal digits of the integuer.
Returns
true
if every character in
text
is
a letter from the current locale,
false
otherwise.
When called with an empty string the result will always be
false
.
Example #1 A ctype_alpha() example (using the default locale)
<?php
$strings
= array(
'CjgWZC'
,
'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"
;
}
}
?>
The above example will output:
The string CjgWZC consists of all letters. The string arf12 does not consist of all letters.