Increment a large integer

Question

I'd like an incremented $max_id to be returned.

Seems that the following script doesn't work:

<?php
$max_id = 656886639189471232;
$max_id = $max_id+1;
$max_id = number_format($max_id, 0, '', '');
var_dump($max_id);
?>

Needed 656886639189471233

Answer 1

Try this:

<?php
$a = "656886639189471232";
$b = "1";

echo bcadd($b, $a,0);
?>

If your input data are integers you can convert $a and $b to string with:

$var=5;
$tostring = strval($var);
echo var_dump($tostring);

Answer 2

The problem is number_format is made for float.

You can have details on this other post Why is my number value changing using number_format()?

Answer 3

Remove the following line:

$max_id = number_format($max_id, 0, '', '');

The following works fine:

$max_id = 656886639189471232;
$max_id = $max_id+1;
var_dump($max_id);