What are common pitfalls to avoid when using meta refresh in PHP?

Common pitfalls to avoid when using meta refresh in PHP include not setting a proper delay time, not providing a valid URL to redirect to, and not handling potential security risks such as open redirects. To solve these issues, make sure to specify a delay time in seconds, validate the URL being redirected to, and sanitize user input to prevent open redirects. 

<?php
$delay = 5; // Set delay time in seconds
$url = "https://example.com"; // Specify the valid URL to redirect to

// Validate the URL
if (filter_var($url, FILTER_VALIDATE_URL)) {
    // Sanitize user input to prevent open redirects
    header("Refresh: $delay; URL=$url");
    exit();
} else {
    echo "Invalid URL";
}
?>

Keywords

meta refresh PHP header function SEO redirect loop

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