严格的标准:mysqli_multi_query 的 mysqli_next_result() 错

问题描述

我曾尝试使用 multi_query，但我不断收到严格的标准消息.

I have tried using multi_query but I keep getting a strict Standards message popping up.

$querystring = "INSERT INTO responses VALUES('1', '2', '3', '4'); INSERT INTO responses VALUES('1', '2', '3', '4')";

if (mysqli_multi_query($db, $querystring)) {
   do {
       if ($result = mysqli_store_result($db)) {
           //
       }
   } while (mysqli_next_result($db));
}
echo "end";

我得到的错误信息是:

严格标准:mysqli_next_result():没有下一个结果集.请调用mysqli_more_results()/mysqli::more_results()检查是否调用这个函数/方法

Strict Standards: mysqli_next_result(): There is no next result set. Please, call mysqli_more_results()/mysqli::more_results() to check whether to call this function/method

我尝试添加和删除 -; 但没有成功.

I've tried adding and removing -; but had no luck.

推荐答案

虽然 pipodesign 更正了 $querystring 中的错误并缓解了问题，但并未提供有关 Strict Standards 错误的实际解决方案.

While pipodesign corrected the error within the $querystring and alleviated the problem, the actual solution was not provided regarding the Strict Standards error.

我不同意 SirBT 的建议，没有必要从 DO WHILE 更改为 WHILE.

I disagree with SirBT's advice, changing from DO WHILE to WHILE is not necessary.

您收到的严格标准消息非常有用.要服从，请使用:

The Strict Standards message that you receive is quite informative. To obey, use this:

do{} while(mysqli_more_results($db) && mysqli_next_result($db));

然后，您无需在循环内部编写条件退出或中断，因为 while 条件将在第一次出现错误时中断循环.*注意，如果第一个查询有错误，则 do-while 之前的 if 语句将拒绝进入循环.

Then, there is no need for you to write a conditional exit or break inside of the loop because the while condition will break the loop on the first occurrence of an error. *note, the if statement before the do-while will deny entry to the loop if the first query has an error.

在您的示例中，您只运行 INSERT 查询，因此您不会收到任何要处理的结果集.如果要计算添加了多少行，请使用 mysqli_affected_rows().

In your example, you are only running INSERT queries, so you won't receive any result sets to process. If you want to count how many rows you've added, use mysqli_affected_rows().

作为您问题的完整解决方案:

As a complete solution for your question:

if(mysqli_multi_query($db,$querystring)){
    do{
        $cumulative_rows+=mysqli_affected_rows($db);
    } while(mysqli_more_results($db) && mysqli_next_result($db));
}
if($error_mess=mysqli_error($db)){echo "Error: $error_mess";}
echo "Cumulative Affected Rows: $cumulative_rows";

输出:

 // if no errors
Cumulative Affected Rows: 2

// if error on second query
Error: [something]
Cumulative Affected Rows: 1

// if error on first query
Error: [something]
Cumulative Affected Rows: 0

<小时>

后期

由于刚接触 mysqli 的人在这篇文章中遇到了困难，我将提供一个通用但强大的代码段来使用 multi_query() 处理有/没有结果集的查询，并添加一个功能来显示正在处理数组中的哪个查询...

Since people new to mysqli are stumbling across this post, I'll offer a general yet robust snippet to handle queries with/without result sets using multi_query() and add a feature to display which query in the array is being handled...

经典的IF(){DO{} WHILE}"语法:

if(mysqli_multi_query($mysqli,implode(';',$queries))){
    do{
        echo "<br><br>",key($queries),": ",current($queries);  // display key:value @ pointer
        if($result=mysqli_store_result($mysqli)){   // if a result set
            while($rows=mysqli_fetch_assoc($result)){
                echo "<br>Col = {$rows["Col"]}";
            }
            mysqli_free_result($result);
        }
        echo "<br>Rows = ",mysqli_affected_rows($mysqli); // acts like num_rows on SELECTs
    } while(next($queries) && mysqli_more_results($mysqli) && mysqli_next_result($mysqli));
}
if($mysqli_error=mysqli_error($mysqli)){
    echo "<br><br>",key($queries),": ",current($queries),"Syntax Error:<br>$mysqli_error";  // display array pointer key:value
}
//if you want to use the snippet again...
$mysqli_error=null; // clear variables
reset($queries); // reset pointer

<小时>

重新发明的轮子WHILE{}"语法(...对于那些不喜欢测试后循环的人):

Reinvented Wheel "WHILE{}" Syntax (...for those who don't like post-test loops):

while((isset($multi_query) && (next($queries) && mysqli_more_results($mysqli) && mysqli_next_result($mysqli))) || (!isset($multi_query) && $multi_query=mysqli_multi_query($mysqli,implode(';',$queries)))){
    echo "<br><br>",key($queries),": ",current($queries);  // display array pointer key:value
    if($result=mysqli_store_result($mysqli)){
        while($rows=mysqli_fetch_assoc($result)){
            echo "<br>Col = {$rows["Col"]}";
        }
        mysqli_free_result($result);
    }
    echo "<br>Rows = ",mysqli_affected_rows($mysqli); // acts like num_rows on SELECTs
}
if($mysqli_error=mysqli_error($mysqli)){
    echo "<br><br>",key($queries),": ",current($queries),"Syntax Error:<br>$mysqli_error";  // display array pointer key:value
}
//if you want to use the snippet again...
$multi_query=$mysqli_error=null; // clear variables
reset($queries); // reset pointer

因此，给出以下查询的任一片段都将提供相同的输出:

So, either snippet given the following queries will offer the same output:

查询数组:

$queries[]="SELECT * FROM `TEST`";
$queries[]="INSERT INTO `TEST` (Col) VALUES ('string1'),('string2')";
$queries[]="SELECT * FROM `TEST`";
$queries[]="DELETE FROM `TEST` WHERE Col LIKE 'string%'";

输出:

0: SELECT * FROM `TEST`
Rows = 0

1: INSERT INTO `TEST` (Col) VALUES ('string1'),('string2')
Rows = 2

2: SELECT * FROM `TEST`
Col = string1
Col = string2
Rows = 2

3: DELETE FROM `TEST` WHERE Col LIKE 'string%'
Rows = 2

根据您的需要修改我的片段.如果您发现错误，请发表评论.

Modify my snippets per your needs. Leave a comment if you discover a bug.

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