How to control page jump in php

How to control page jump in php: Control page jump by using header("Refersh: seconds; url=address"). For example, to achieve automatic jump after 3 seconds, the specific method is: [header("Refresh:3;url=helloworld.php")].

php automatically refreshes the current page after a certain delay and automatically jumps to the header ("Refresh: seconds; url=address").

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Example:

Automatically jump after 3 seconds

<?php   
    header("Refresh:3;url=helloworld.php")
?>

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Automatically jump after 1 second

header("refresh:1;url={$url}");exit;

Call the sleep() method, the effect is also to execute the jump after x seconds

<?php 
    sleep(3); 
    header("location:url地址")
?>

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