The ctype_lower() function check for lowercase character(s). It returns TRUE if every character in text is a lowercase letter in the current locale.
Syntax
ctype_lower(str)
Parameters
str − The tested string
Return
The ctype_lower() function returns TRUE if every character in text is a lowercase letter in the current locale.
Example
The following is an example −
<?php
$arr = array('Tim879', 'tom');
foreach ($arr as $x) {
if (ctype_lower($x)) {
echo "$x consists of all lowercase letters. \n";
}else {
echo "$x does not have all lowercase letters. \n";
}
}
?>Output
The following is the output −
Tim879 does not have all lowercase letters. tom consists of all lowercase letters.