在日期范围内保存数据库的日期

Question

我想选择日期范围内的所有星期一并将日期保存在数据库中。这是我尝试过的代码。但它只保存最后一个日期。我想保存所有的星期一。请问您能帮帮我吗？

$startDate = '2011-08-10';
$endDate = '2011-10-23';

for ($i = strtotime($startDate); $i <= strtotime($endDate); $i = strtotime('+1 day', $i)) {
    if (date('N', $i) == 1) {
       $query = "INSERT INTO class(Day, Date) VALUES('Monday', '".date('Y-m-d', $i)."')";
    }
}

Answer 1

在循环中执行查询，而不是在最后执行

$startDate='2011-08-10';
$endDate='2011-10-23';
for ($i = strtotime($startDate); $i <= strtotime($endDate); $i = strtotime('+1 day', $i)) {
    if (date('N', $i) == 1){
        $query = "INSERT INTO class(Day, Date) VALUES('Monday','".date('Y-m-d', $i)."')";
        mysql_query($query); // you execute the query here otherwise it will overwrite over and over and only the last query will be executed
    }
}

或散装

$startDate='2011-08-10';
$endDate='2011-10-23';
$query = "INSERT INTO class(Day, Date) VALUES ";
for ($i = strtotime($startDate); $i <= strtotime($endDate); $i = strtotime('+1 day', $i)) {
    if (date('N', $i) == 1){
        $query .= "('Monday','".date('Y-m-d', $i)."'),";
    }
}
$query = substr($query, 0, -1).";"; // remove the last "," and add ;
mysql_query($query);