How do you call the PHP ceil() function?

In PHP, rounding up can be achieved using the ceil() function. The ceil() function returns the smallest integer that is not less than the given number.

Here is an example of using the ceil() function:

$num = 10.4;
$roundedNum = ceil($num);

echo $roundedNum; // 输出结果为 11

In the example above, the variable $num holds a decimal number and the ceil() function is used to round it up. The rounded result is then stored in the variable $roundedNum and displayed on the screen using an echo statement.