Why is my number value changing using number_format()?

Question

The following code gives me two different outputs:

$number = \'1562798794365432135246\';
echo $number; 
echo number_format($number);

Can an

Answer 1

I know this is an old question, but I came across this issue recently and coded a function that works for my purpose. Hopefully it helps others. It works with single quote strings and $_GET. I haven't tested $_POST. Modifications will have to be made if you are dealing with negative integers or non integers.

 3){
    if ($len % 3 == 0) {
        $split = str_split($number, 3);
        $number_with_commas = implode("$delimiter", $split);
        return $number_with_commas;
    }
    else if ($len % 3 == 1) {
        $front = substr($number, 0, 1);
        $split = substr($number, 1, $len - 1);
        $split = str_split($split, 3);
        $number_with_commas = implode("$delimiter", $split);
        $number_with_commas = $front . "$delimiter" . $number_with_commas;
        return $number_with_commas;
    }
    else {
        $front = substr($number, 0, 2);
        $split = substr($number, 2, $len - 2);
        $split = str_split($split, 3);
        $number_with_commas = implode("$delimiter", $split);
        $number_with_commas = $front . "$delimiter" . $number_with_commas;
        return $number_with_commas;
    }
}
else {
    return $number;
}
}
$num = '1234567891234567891234567891234'; 
echo format_big_numbers($num, ","); // output is 1,234,567,891,234,567,891,234,567,891,234
?>