To automatically scroll down in a browser while printing results with PHP, you can use JavaScript. PHP by itself cannot control the browser’s UI. However, with the help of JavaScript, you can manipulate the browser’s DOM and behaviors like scrolling.
Here’s a way to do it:
- Include a
<script> block to run a JavaScript function that scrolls the page down every time new content is added.
- Modify your PHP to trigger this JavaScript function after each flush.
Do it like this:
ob_start();
function fls() {
ob_end_flush();
if (ob_get_level() > 0) { ob_flush(); }
flush();
ob_start();
echo '<script>scrollToBottom()</script>'; // Trigger the JavaScript function
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Scroll Down</title>
</head>
<body>
<script>
function scrollToBottom() {
window.scrollTo(0,document.body.scrollHeight); // Scroll to the bottom of the document
}
</script>
<?php
for ($i = 1; $i <= 50; $i++) {
echo $i."<br>";
fls();
sleep(1);
}
?>
</body>
</html>
In the example above, after each number is printed and the buffer is flushed, we execute the JavaScript function scrollToBottom() that scrolls the page to its bottom. The result should be a continuous scrolling effect as new numbers are printed.
Keep in mind that this approach relies on the combination of PHP’s output buffering and JavaScript’s control over the browser UI. Your web server also needs to support flushing content in real time for this to work correctly. Some servers might buffer the output at the server level, causing this approach not to work.
Good luck
