如何使用 php 更新数组值并将其放入 mysql 数据库中?
好吧,不久前我问了这个问题
如何在 foreach 循环中获取并存储多个 $_POST 变量?
响应非常完美,并且它可以很好地将值插入数据库。然而,我现在正在重新访问这个项目,我只想使用相同或类似的方法更新数据库中的一个字段,特别是该特定用户的后测试字段。这怎么可能呢?
目前我有一些与此类似的东西。
$SGUID = the Unique User ID
$SGpost = the field i want to update
$SGQID = question ID
显然,这不起作用......而且我的代码非常草率,因为我试图一路替换和编辑它。有什么想法吗?
foreach ($_POST as $p => $v)
{
if (preg_match("/^Q\d+$/",$p)) { //$_POST variables with Q1, Q2, Q3, etc etc
$query_3 = mysql_query("UPDATE SGresults SET SGpost = '$p', SGpostCheck = 1 WHERE SGUID = '$SGUID' AND SGQID = '$p'") or die('Error: '.mysql_error ());
$SGQID++;
}
}
}
当我回显 $p 时,我得到以下内容 Q11 Q21 Q31 Q44 Q54 Q63 Q73 Q83 Q93 Q103 Q111 Q122 Q131 Q142 Q153 Q163 Q17
这就是我想要的,除了没有 Q,只有第二个值。例如,如果它是“Q163”,我只想将“3”部分插入到数据库为“Q16”的 SGpost 中。
再次感谢!任何帮助将不胜感激!
编辑:: 再次查看我的代码并更改了一些值......以下内容确实有效,所以我想我会坚持下去。除非代码不好?再次感谢您的建议。
$SGQID= 1;
foreach ($_POST as $i => $v)
{
if (preg_match("/^Q\d+$/",$i)) { //$_POST variables with Q1, Q2, Q3, etc etc
// Here we insert value $v to database
if ($SGtestType == "Post-test") {
$query_post = mysql_query("UPDATE SGresults SET SGpost = '$v', SGpostcheck ='1' WHERE SGQID = '$SGQID' AND SGUID = '$SGUID' ") or die('Error 109: '.mysql_error ());
$SGQID++;
// ^^ increments the question value everytime an insert is made
//last 2 fields is check for existing value.. or if not exists.. 1 if it does.
}
}
}
}
Okay so a while ago I asked this question
How can I grab and store multiple $_POST Variables in a for each loop?
And the response was perfect, and it worked for inserting the values into the database just fine. However, I now am revisiting this project and I want to UPDATE only one field in the database, specifically the post test field for that particular user, using the same or similar method. How would this be possible?
Currently I have something along the lines of this.
$SGUID = the Unique User ID
$SGpost = the field i want to update
$SGQID = question ID
Obviously, this does not work.. and my code is extremely sloppy as I tried to replace and edit this along the way. Any ideas?
foreach ($_POST as $p => $v)
{
if (preg_match("/^Q\d+$/",$p)) { //$_POST variables with Q1, Q2, Q3, etc etc
$query_3 = mysql_query("UPDATE SGresults SET SGpost = '$p', SGpostCheck = 1 WHERE SGUID = '$SGUID' AND SGQID = '$p'") or die('Error: '.mysql_error ());
$SGQID++;
}
}
}
When I echo out $p I get the following
Q11
Q21
Q31
Q44
Q54
Q63
Q73
Q83
Q93
Q103
Q111
Q122
Q131
Q142
Q153
Q163
Q17
Which is what I want, except without the Q, and just the second value. So for example if it was 'Q163' I just want to insert the '3' part into SGpost WHERE the database is 'Q16'.
Thanks again again! Any help would be greatly appreciated!
EDIT::
Looked over my code again and changed some values around...The following DOES work, so I think I will stick with it. Unless bad code? Thanks again for your suggestions.
$SGQID= 1;
foreach ($_POST as $i => $v)
{
if (preg_match("/^Q\d+$/",$i)) { //$_POST variables with Q1, Q2, Q3, etc etc
// Here we insert value $v to database
if ($SGtestType == "Post-test") {
$query_post = mysql_query("UPDATE SGresults SET SGpost = '$v', SGpostcheck ='1' WHERE SGQID = '$SGQID' AND SGUID = '$SGUID' ") or die('Error 109: '.mysql_error ());
$SGQID++;
// ^^ increments the question value everytime an insert is made
//last 2 fields is check for existing value.. or if not exists.. 1 if it does.
}
}
}
}
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