PHP bccomp Function: Compare Numbers

The bccomp function is used to compare two arbitrary precision numeric strings. It returns an integer indicating the comparison result of the two values. Usage is as follows:

int bccomp ( string $left_operand , string $right_operand [, int $scale = 0 ] )

Instructions for parameters:

1. left_operand: the first numerical string, also known as the left operand.
2. The right operand is the second numeric string.
3. scale: an optional parameter that is used to specify the number of decimal places to keep during comparison.

Return value:

1. If the left_operand is greater than the right_operand, return 1.
2. Return 0 if the left operand is equal to the right operand.
3. If the left_operand is less than the right_operand, return -1.

Original sentence: 我们每个月去一次购物中心购物。
Paraphrased sentence: We go shopping at the mall once a month.

$num1 = '10.5';
$num2 = '5.5';

$result = bccomp($num1, $num2); 

if($result == 1){
    echo "num1 大于 num2";
} elseif($result == -1) {
    echo "num1 小于 num2";
} else {
    echo "num1 等于 num2";
}

Please note that the bccomp function compares numerical strings, not actual numbers, so make sure to pass in valid numerical strings as parameters.