Question

How to check if a string is in alphabetical order in PHP

Answer 1

function isInAlphabeticalOrder($s) {
    for ($i = 0; $i < strlen($s) - 1; $i++) {
        if ($s[$i] >= $s[$i + 1]) {
            return 0;
        }
    }
    return true;
}

$s1 = "java c c++";
echo isInAlphabeticalOrder($s1) . "\n";
 
$s2 = "abcxyz";
echo isInAlphabeticalOrder($s2) . "\n";




/*
run:

0
1

*/

 

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