PHP | Check if all characters are lower case
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 : w3wiki Output : Yes Explanation : The string "w3wiki" 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// PHP program to check if a string has all// lower case characters$strings = array('gfg123', 'w3wiki', 'GfG');// Checking for above three strings one by one.foreach ($strings as $testcase) { if (ctype_lower($testcase)) { echo "Yes\n"; } else { echo "No\n"; }}?> |
Output :
No Yes No
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