How does the placement of HTML output affect the functionality of setcookie() in PHP scripts?

The placement of HTML output before calling the setcookie() function in PHP scripts can cause an error because headers must be sent before any output is displayed. To solve this issue, make sure to call the setcookie() function before any HTML output is generated in the script. 

<?php
// Call setcookie() before any HTML output
setcookie("user", "John Doe", time() + 3600);

// HTML output can be placed after setting the cookie
?>
<!DOCTYPE html>
<html>
<head>
    <title>Setting Cookie</title>
</head>
<body>
    <h1>Cookie set successfully!</h1>
</body>
</html>

Keywords

setcookie HTML output functionality PHP scripts placement

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