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PHP time_sleep_until() function (with example)

Hey everyone,

I'm currently working on a PHP project and I came across the `time_sleep_until()` function. I've been reading the PHP documentation on it but I'm still a bit confused about how it works. I was wondering if anyone here could help me understand it better and maybe provide an example?

I understand that `time_sleep_until()` makes the script sleep until the specified time, but I'm not sure how to use it effectively in my code. Can anyone provide an example of how they have used `time_sleep_until()` in their own projects?

I would really appreciate any insights or advice you can provide. Thanks in advance!

All Replies


Hey there!

I've used the `time_sleep_until()` function in one of my PHP projects, so I can definitely share my experience with you. In my case, I needed to implement a script that would fetch data from an API every hour.

To achieve this, I used the `time()` function to get the current timestamp and then added an hour to it. So let's say the current timestamp was 1609458000 (which represents January 1, 2021, 12:00 PM). I would add 3600 seconds to it, resulting in 1609461600 (January 1, 2021, 1:00 PM) as the target time.

Then, I used the `time_sleep_until()` function to make my script sleep until that target time was reached. Here's an example snippet of code that illustrates how I implemented it:

$targetTime = time() + 3600; // Add 1 hour to current timestamp
time_sleep_until($targetTime); // Sleep until target time is reached

// Fetch data from API and perform necessary operations here
// This code will execute once the target time is reached

By using `time_sleep_until()`, my script would pause execution until the target time was reached. This helped me ensure that the data was fetched regularly without overwhelming the API with too many requests.

I hope this example helps you understand how to use `time_sleep_until()` in your PHP project. Feel free to ask if you have any further questions or need clarifications!


Hey folks!

I had the opportunity to work on a PHP project where I utilized the `time_sleep_until()` function, and I wanted to share my experience with you all. In my case, I needed to implement a script that would synchronize data with an external server every 30 minutes.

To accomplish this, I combined `time_sleep_until()` with the `strtotime()` and `date()` functions. Here's an example snippet to illustrate how I used them:

while (true) {
$nextSyncTime = strtotime('+30 minutes');

// Perform data synchronization here
echo 'Syncing data at ' . date('h:i A', $nextSyncTime) . "\n";

In this code, the `strtotime('+30 minutes')` function calculates the timestamp for the next synchronization, which is 30 minutes from the current time. Then, the `time_sleep_until()` function pauses the script until that timestamp is reached.

Once the script resumes execution at the specified time, the data synchronization process takes place. The `date('h:i A', $nextSyncTime)` function is used to display the synchronized time in a human-readable format.

By repeating this loop indefinitely, the script ensures that data synchronization occurs every 30 minutes. This approach helped me keep my data up-to-date without overwhelming the server with constant requests.

If you have any questions or need further clarification on using `time_sleep_until()` or any other aspect, feel free to ask. I'm more than happy to assist you!


Hey there!

I've also had some experience using the `time_sleep_until()` function in one of my PHP projects, and I thought I'd share my approach with you. In my case, I was working on a script that needed to run certain tasks at specific intervals throughout the day.

To achieve this, I used an array to store the desired time intervals in seconds. For example, let's say I wanted to execute a task at 10 AM, 2 PM, and 6 PM. I would convert these times to their respective timestamps using the `strtotime()` function.

Next, I created a loop that would iterate through the array and execute the task at each interval. Within the loop, I used the `time()` function to get the current timestamp, and then checked if it matched any of the desired timestamps stored in the array.

Here's an example code snippet to illustrate my approach:

$timeIntervals = [
strtotime('10:00 AM'),
strtotime('2:00 PM'),
strtotime('6:00 PM')

foreach ($timeIntervals as $interval) {
$currentTimestamp = time();

if ($currentTimestamp >= $interval) {
// Execute your task here
echo "Executing task at " . date('h:i A', $interval) . "\n";

// Calculate the next interval by adding a day (86400 seconds)
$interval += 86400;

// Calculate the remaining duration until the next interval
$sleepTime = $interval - $currentTimestamp;
time_sleep_until(time() + $sleepTime);

By using `time_sleep_until()` in this way, my script would pause execution until the next desired interval was reached, ensuring that tasks were executed at the specified times.

I hope this explanation gives you some insight into another way to utilize the `time_sleep_until()` function in your PHP project. If you have any questions or need further assistance, feel free to ask!

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