PHP code example of facile-it / zf-link-headers-module

1. Go to this page and download the library: Download facile-it/zf-link-headers-module library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

facile-it / zf-link-headers-module example snippets


const MODE_PRELOAD = 'preload';
const MODE_PREFETCH = 'prefetch';
const MODE_DNS_PREFETCH = 'dns-prefetch';
const MODE_PRECONNECT = 'preconnect';
const MODE_PRERENDER = 'prerender';


return [
    'facile' => [
        'zf_link_headers_module' => [
            'stylesheet_enabled' => false, // send link headers for stylesheet links
            'stylesheet_mode' => 'preload', // resource hint for stylesheet links
            'script_enabled' => false, // send link headers for scripts
            'script_mode' => 'preload', // resource hint for script links
            'http2_push_enabled' => true, // if disabled, a "nopush" attributed will be added to disable HTTP/2 push 
        ],
    ],
];


return [
    'facile' => [
        'zf_link_headers_module' => [
            'stylesheet_enabled' => false, // send link headers for stylesheet links
            'stylesheet_mode' => 'preload', // resource hint for stylesheet links
            'script_enabled' => false, // send link headers for scripts
            'script_mode' => 'preload', // resource hint for script links
            'http2_push_enabled' => true, // if disabled, a "nopush" attributed will be added to disable HTTP/2 push 
        ],
    ],
];


return [
    'facile' => [
        'zf_link_headers_module' => [
            'stylesheet_enabled' => true, // send link headers for stylesheet links 
        ],
    ],
];


return [
    'facile' => [
        'zf_link_headers_module' => [
            'script_enabled' => true, // send link headers for script links 
        ],
    ],
];

phtml
<!DOCTYPE html>
<html lang="it">
    <head>
        <?= 
        $this->headLink(['rel' => 'preload', 'as' => 'image',  'href' => $this->basePath() . $this->asset('assets/images/logo.png'), 'media' => 'image/png')
             ->headLink(['rel' => 'preload', 'as' => 'style',  'href' => $this->basePath() . $this->asset('assets/vendor.css')])
             ->headLink(['rel' => 'preload', 'as' => 'script', 'href' => $this->basePath() . $this->asset('assets/vendor.js')])
             // prefetch (low priority) resources 
phtml
<!DOCTYPE html>
<html lang="it">
    <head>
        <?= 
        $this->prependStylesheet($this->basePath() . $this->asset('assets/vendor.css'))