Question

How to check if there is only one time zero in a string with PHP

Answer 1

function OnlyOneZero($str) {
    $count = 0;
    
    foreach (str_split($str) as $ch) {
        if ($ch == '0') {
            $count++;
        }
    }
    return $count == 1;
}

$s1 = "294098";
echo OnlyOneZero($s1) ? "yes" : "no";

echo "\n";

$s2 = "47034099";
echo OnlyOneZero($s2) ? "yes" : "no";




/*
run:

yes
no

*/

 

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