Asked  7 Months ago    Answers:  5   Viewed   39 times

In a high traffic application, is it possible for mysqli_insert_id() to return the wrong id, or to confuse the id between two INSERT queries performed nearly simultaneously?

 Answers

64

No. mysqli_insert_id returns the most the AUTO_INCREMENT value from the most recent INSERT query on the current connection. It will never get confused with another connection, for example.

Wednesday, March 31, 2021
 
max_
answered 7 Months ago
71

you can't print the result from mysqli_query, it is mysqli_resource and for dumping the error you need to change mysql_error() to mysqli_error()

$username = "bob";
$db = mysqli_connect("localhost", "username", "password", "user_data");
$sql1 = "select id from user_information where username='$username'";
$result = mysqli_query($db, $sql1) or die(mysqli_error());
while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) { 
    echo $row['id'].'<br>'; 
} 
Saturday, May 29, 2021
 
pamelus
answered 5 Months ago
93

You have to build the subreport as a separate report .rdl and build it to accept a parameter of the ID. You will then pass the ID parameter to the subreport once it's added to the parent report. Once the sub is built, tested, and saved...add it to your main report using Insert-> Subreport on the main tab. You should be able to select the cell on the design view where you want the subreport to be and insert the subreport there.

To specify parameters to pass to a subreport

  1. In Design view, right-click the subreport and then click Subreport Properties.
    1. In the Subreport Properties dialog box, click Parameters. Click Add. A new row is added to the parameter grid.
    2. In the Name text box, type the name of a parameter in the subreport or choose it from the list box. This name must match a report parameter, not a query parameter, in the subreport.
    3. In the Value list box, type or select a value to pass to the subreport. This value can be static text or an expression that references a field or other object in the main report.
Friday, August 6, 2021
 
Ula
answered 3 Months ago
Ula
24

I don't think it will work this way. When you close the statement (e.g. $menu_stmt->close();) you also deallocate the statement handle. So the second time through the loop you don't have the prepared statements available to work with anymore.

Try closing the statements after the loop has finished executing.

Friday, August 6, 2021
 
NIKHIL
answered 3 Months ago
73

I think VeeWee provides a great mechanism for preparing a Vagrant box from an ISO:

https://github.com/jedi4ever/veewee

It already provides a lot of out-of-the-box templates for most distributions, which you can customize if required (although this is often not needed). Alternatively you can create your own definitions.

Alternatively you can use Packer:

https://packer.io/

Which is produced by the same company that makes Vagrant, so it has fairly good integration. Packer itself doesn't provided sample templates I believe, but you can use the ones Puppet Labs uses for its own testing purposes if you like:

https://github.com/puppetlabs/puppetlabs-packer

This can be used as a solid base for your own templates and modified to taste, or you can raise a PR on the project to contribute back if desired.

Monday, September 6, 2021
 
Gabriele
answered 2 Months ago
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