如何在PHP中剩余时间结束后隐藏或禁用文本框

Question

I am building an auction website in php. I have calculated remaining time till an auction is live. The remaining time is calculated as $remaning = $date - time(); where $date is the last date till auction of a product is live and it is fetched from the database using mysqli as shown below

<?php
if ($stmts = $mysqli->prepare('SELECT end_date FROM products WHERE pid = ?')) {
    $stmts->bind_param("i",$pid); 
    $stmts->execute(); // Execute the prepared query.
    $stmts->bind_result($endDate); // get variables from result.
    $stmts->fetch();
    $stmts->close();

    $date = strtotime($endDate);
    $remaning = $date - time();
}
?>

I am accepting bidding amount through a text box in my page as shown below.

<form ...>  <!-- Form to submit bidding amount starts here -->
    <input type="text" placeholder = "Bid Price" name="bid_price" id="bid_price" title="Enter your Bid for auction" required />
    <input type="submit" class="sbmt"  name="bidsubmit" id="bidsubmit" value="Submit"/>
</form>     <!-- Form ends here -->

How can I make that text box having id bid_price disabled or hide it after remaining time is over, so that no user can bid after that.

Answer 1

With what you've provided I can simply suggest using a condition as to whether the date is after now like so:

$date = DateTime('now');
$date->modify('+ 2 day');//testing negative

if ($date > DateTime('now')) {
    //show form
} else {
    //auction has ended
}

In the snippet above if you set the modify function to - 1 days the form will not show! Yeyyyyys

Note that I've set the operator to > rather than >= so that the form does not show exactly when the action is set to end. Another thing to bear in mind is timezones! But this shouldn't matter too much in your question?

Furthermore

Being a lover of packages in the packagist sense there is a package called Carbon which I think is really cool and simple to use.

if ($date->lt(Carbon::now()) {
}

It also has some cool features for date formatting and interval formatting. In this scenario I'd recommend using the diffForHumans method which gives some cool output like 2 days, 30 seconds ago. There's probably a method or parameter you can set to say Ends in 30 seconds time

http://carbon.nesbot.com/docs/