Question

我有一个循环，我必须对数据库进行多次插入，看来我每次获取新数据和数据更改时都必须绑定数据数组。我虽然可以绑定一次并插入多次。

进一步的研究表明，PDO可能更适合这项任务，但我很好奇为什么它与mysqli一样，如果有一种方法可以将数组绑定一次并执行多次。

请参阅代码中的注释以获取更多详细信息。

<?php
//usual db stuff
$DBhost = 'localhost';
$DBname = 'test';
$DBuser = '';
$DBpass = '';

//error reporting for mysql
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

//connect to database
$conn = new mysqli($DBhost, $DBuser, $DBpass, $DBname);

//prepare this is a dummy table in a dummy database
//actual table is quite complicated
$stmt = $conn->prepare('INSERT INTO `users` (`fname`,`lname`,`city`) VALUES(?,?,?)');

//create a variable to store the data
// so we can bind it before going further
$data=array_fill(0,3,'');
//bind params use array expansion
$stmt->bind_param('sss', ...$data);

//this part runs in a loop
// mock loop for just to show idea
for($i=0;$i<1;$i++)
{
    //get the data
    $data = get_data();
    //already binded $data before the loop
    //so execute this should insert the data just returned
    //except this doesnt, it inserts blanks
    //it acts as if the data still has the blank array from line 20
    $stmt->execute();

    //bind it again
    $stmt->bind_param('sss', ...$data);
    //execute
    //this inserts the data
    $stmt->execute();
}

//mock function to return data the actual function 
//returns a multi dimesional array for multiple tables
function get_data()
{
    return(array("dinesh","chand","nadi"));
}

高度赞赏的任何帮助或想法

Answer 1

第一次运行$stmt->execute();时，在for循环中，您在启动for loop之前执行绑定的内容。所以你要做的就是。

绑定您想要的内容$stmt->bind_param('sss', ...$data);
然后执行$stmt->execute();

在上面的代码中，首先删除$stmt->execute();（首先在for loop内）。然后在第一次绑定参数后（for loop上方）添加它。如下，

注意：我更改的内容标有########

<?php
//usual db stuff
$DBhost = 'localhost';
$DBname = 'test';
$DBuser = '';
$DBpass = '';

//error reporting for mysql
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

//connect to database
$conn = new mysqli($DBhost, $DBuser, $DBpass, $DBname);

//prepare this is a dummy table in a dummy database
//actual table is quite complicated
$stmt = $conn->prepare('INSERT INTO `users` (`fname`,`lname`,`city`) VALUES(?,?,?)');

//create a variable to store the data
// so we can bind it before going further
$data=array_fill(0,3,'');
//bind params use array expansion
$stmt->bind_param('sss', ...$data);

$stmt->execute(); //########

//this part runs in a loop
// mock loop for just to show idea
for($i=0;$i<1;$i++)
{
    //get the data
    $data = get_data();
    //already binded $data before the loop
    //so execute this should insert the data just returned
    //except this doesnt, it inserts blanks
    //it acts as if the data still has the blank array from line 20
    //$stmt->execute(); ########

    //bind it again
    $stmt->bind_param('sss', ...$data);
    //execute
    //this inserts the data
    $stmt->execute();
}

每次在循环中使用php mysqli绑定数组参数

1 个答案: