(PHP 4, PHP 5)
ceil — Round fractions up
$value
    )
   Returns the next highest integer value by rounding up 
   value if necessary. 
  
value
     The value to round
   value rounded up to the next highest
   integer.
   The return value of ceil() is still of type
   float as the value range of float is 
   usually bigger than that of integer.
  
Example #1 ceil() example
<?php
echo ceil(4.3);    // 5
echo ceil(9.999);  // 10
echo ceil(-3.14);  // -3
?>