What will be the output of the following PHP code ?<?php$p

What will be the output of the following PHP code ?

<?php
$p = 0;
for(++$p; ++$p; ++$p)
{
    print $p;
    if ($p == 6) 
        break;
}
?>

The order of execution is initialization, check, increment/decrement, check, increment/decrement, check, increment/decrement….so on.