How can one automatically convert relative links to absolute links in PHP?

When dealing with relative links in PHP, it may be necessary to convert them to absolute links for proper functionality. This can be achieved by using the PHP function "parse_url" to extract the base URL and then concatenating it with the relative link to form an absolute link. 

function convert_relative_to_absolute($relative_link) {
    $base_url = "http://www.example.com"; // Your base URL here
    $parsed_base_url = parse_url($base_url);
    
    if (substr($relative_link, 0, 2) == "//") {
        return $parsed_base_url['scheme'] . ":" . $relative_link;
    }
    
    if (substr($relative_link, 0, 1) == "/") {
        return $parsed_base_url['scheme'] . "://" . $parsed_base_url['host'] . $relative_link;
    }
    
    return $base_url . "/" . $relative_link;
}

// Example usage
$relative_link = "/path/to/page";
$absolute_link = convert_relative_to_absolute($relative_link);
echo $absolute_link;

Keywords

PHP relative links absolute links URL parsing

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