cron.php

function myfloor( $value , $precision = 0 ){
    $multiplier = (int) ("1" . str_repeat( 0 , $precision ));
    return floor( $value * $multiplier ) / $multiplier;
}

function myceil( $value , $precision = 0 ){
    $multiplier = (int) ("1" . str_repeat( 0 , $precision ));
    return ceil( $value * $multiplier ) / $multiplier;
}