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PHP reap_async_query() function (with example)

Hey guys,

I need your help regarding the PHP `reap_async_query()` function. I came across this function while working on my project and I'm having some trouble understanding how it works exactly. I have already gone through the PHP documentation, but I'm still unsure about its practical implementation.

To give you some context, I'm currently building a web application using PHP and MySQL. On certain pages, I need to run multiple queries asynchronously to improve performance. I found out that PHP provides an `async_query()` function for this purpose, but I'm not entirely sure how to handle the results after the queries have been executed.

I stumbled upon the `reap_async_query()` function, which seems to be related to processing the results of asynchronous queries. However, I couldn't find any substantial examples or explanations online.

Could someone please provide me with a clearer explanation of how to use the `reap_async_query()` function? It would be great if you could also provide a simple example illustrating its usage.

Thanks in advance for your help!

All Replies


Hey folks,

I've come across this discussion on `reap_async_query()` and thought I'd share my personal experience with it. I recently encountered a similar scenario while working on a PHP project that involved executing multiple asynchronous queries.

To utilize the `reap_async_query()` function effectively, I followed a step-by-step approach. First, I executed the asynchronous queries using the `async_query()` function and stored the query identifiers for each query. This allowed me to keep track of the queries being executed concurrently.

Once the asynchronous queries were initiated, I then utilized a loop and `reap_async_query()` to process the completed queries. By repeatedly calling `reap_async_query()` within the loop, I could fetch the results of each executed query and perform necessary operations on them.

Here's a concise example to illustrate this approach:

$queryId1 = async_query($connection, $query1); // Execute async query 1
$queryId2 = async_query($connection, $query2); // Execute async query 2

// Process completed queries
while ($result1 = reap_async_query($queryId1)) {
// Handle the result of query 1

while ($result2 = reap_async_query($queryId2)) {
// Handle the result of query 2

// Don't forget to handle errors
if (mysqli_error($connection)) {
// Handle any errors that occurred during execution

In this example, `async_query()` is called for each asynchronous query, with the corresponding query identifiers (`$queryId1`, `$queryId2`) stored. By using separate loop iterations for each query's `reap_async_query()` calls, I was able to process the results individually.

Keep in mind to incorporate appropriate error handling by checking `mysqli_error($connection)` to handle any potential errors during query execution.

I hope my personal experience helps you better understand the practical usage of `reap_async_query()`. If you have any further questions, I'd be happy to assist! Happy coding!


Hey there,

I can definitely help shed some light on the usage of the `reap_async_query()` function in PHP. I've used it before in a project where I needed to run multiple database queries asynchronously.

Essentially, after you execute an asynchronous query using the `async_query()` function, you need to call `reap_async_query()` to process the results of the executed queries. This function allows you to fetch the results of the completed asynchronous query.

Here's a simple example to demonstrate how it works:

$queryId = async_query($connection, $query); // Execute the asynchronous query
// ... Execute more queries asynchronously if needed ...

// Now let's process the completed queries
while ($result = reap_async_query()) {
// Process the result of the query
// Access individual rows and fields using standard MySQL fetch functions

// You can also check if any errors occurred during execution
if (mysqli_error($connection)) {
// Handle the error appropriately

In this example, we first execute the asynchronous query using `async_query()`, which returns an identifier for that particular query. You can repeat this step for as many queries as needed.

Then, by calling `reap_async_query()` in a loop, we can fetch the results of the completed queries one by one. Inside the loop, you can use standard MySQL fetch functions to retrieve individual rows and fields from the result set.

Lastly, it's essential to check for any errors using `mysqli_error()`, as we would do with any regular query execution.

I hope this explanation and example help clarify the usage of `reap_async_query()` for you. Let me know if you have any further questions!


Hey everyone,

I've had experience with the PHP `reap_async_query()` function, and I thought I'd share my approach to using it effectively in a project.

When it comes to dealing with asynchronous queries, the `reap_async_query()` function plays a crucial role in obtaining the results of those queries. In my case, I was working on a web application that required the execution of multiple asynchronous queries simultaneously.

After calling the `async_query()` function to initiate the asynchronous query, it's essential to handle the results using the `reap_async_query()` function. The beauty of `reap_async_query()` is that it allows you to retrieve the results of each executed query one at a time.

Here's a condensed example to showcase the usage:

$queryId = async_query($connection, $query); // Execute asynchronous query
// ... Execute more asynchronous queries if necessary ...

// Process completed queries
while ($result = reap_async_query()) {
// Handle the query results here
// Use appropriate methods to fetch data from the result set

// Don't forget to check for errors
if (mysqli_error($connection)) {
// Deal with any errors that occurred during execution

Upon executing the asynchronous query using `async_query()`, we obtain an identifier (`$queryId`) for that particular query. Repeat this step for all the necessary asynchronous queries.

By utilizing a loop with `reap_async_query()`, we can retrieve the results of these completed queries one by one. Inside the loop, you can make use of relevant methods to fetch data from the result set, such as fetching individual rows and fields.

Lastly, it's crucial to incorporate proper error handling by checking for any errors using `mysqli_error()`. Being attentive to possible errors allows you to handle them appropriately, ensuring a smooth execution flow.

I hope my personal experience provides some insights into the usage of the `reap_async_query()` function. Feel free to ask if you need further clarification or have any additional queries. Happy coding!

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