PHP正負數轉換
1、正數轉負數
$number = 99;
$number *= -1;
echo $number; //輸出 -99
2、負數轉正數
$number = -11;
$result = abs($number);
echo $result; //輸出 11
PHP正負數轉換
1、正數轉負數
$number = 99;
$number *= -1;
echo $number; //輸出 -99
2、負數轉正數
$number = -11;
$result = abs($number);
echo $result; //輸出 11