Rounding value correctly

intval() does not round values correctly!!!!
As for C++, it simply converts to int and ignores decimal places. If you want a source value of say 5.6 to be converted to an integer of 6 and not 5, then use:

  $MyIntValue = intval(round(5.6));    //<<< intval() because round() outputs a float

Round down

$MyVariable = floor(56.78);    //Returns 56

Round Up

$MyVariable = ceil(56.78);    //Returns 57

Round to a specific number of decimal places

echo round(12.3456789, 3);    //Will print: 12.346