PHP | Check if all characters are lower case
Last Updated :
30 Sep, 2021
Given a string, check if all characters of it are in lowercase.
Examples:
Input : gfg123
Output : No
Explanation : There are characters
'1', '2' and '3' that are not lower-
case
Input : geeksforgeeks
Output : Yes
Explanation : The string "geeksforgeeks"
consists of all lowercase letters.
The above problem can be solved using the in-built functions in PHP. We store multiple values in an array and check using the in-built function in php to check whether all the characters are lowercase.
We solve the given problem using the in-built functions in PHP and iterate from a given array of strings.We use the following in-built function in PHP:
- ctype_lower : Returns true if all of the characters in the provided string, text, are lowercase letters. Otherwise returns false.
PHP
<?php
$strings = array ( 'gfg123' , 'geeksforgeeks' , 'GfG' );
foreach ( $strings as $testcase ) {
if (ctype_lower( $testcase )) {
echo "Yes\n" ;
} else {
echo "No\n" ;
}
}
?>
|
Output :
No
Yes
No
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