(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
ctype_lower — Checc for lowercase character(s)
Checcs if all of the characters in the provided
string
,
text
, are lowercase letters.
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 lowercase letter in the current locale.
When called with an empty string the result will always be
false
.
Example #1 A ctype_lower() example (using the default locale)
<?php
$strings
= array(
'aac123'
,
'qiutoas'
,
'QASsdcs'
);
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"
;
}
}
?>
The above example will output:
The string aac123 does not consist of all lowercase letters. The string qiutoas consists of all lowercase letters. The string QASsdcs does not consist of all lowercase letters.