Html document seo audit (WIP)

This tool applies different SEO audits to HTML page.

How it works:

Provide Html document as input
Tool will parse, extract important data and do some tests.
Output:
- extracted seo data
- audit results

Features

Extracting main SEO data: title, description, keywords, canonical etc.
Title audits:
- Title exist
- Title not empty
- Title not too short and not too long
- No title duplicates
- Title within head
Description audits:
- Description exist
- Description not empty
- Description not too short and not too long
- No Description duplicates
- Description within head
Canonical URL audits:
- Canonical exist
- Canonical not empty
- Canonical not equal page URL
- No Canonical duplicates
- Canonical within head
It's possible to create your own custom Audit and pass to AuditBuilder

Quick Start

<?php

require_once __DIR__.'/vendor/autoload.php';

use Wizardstool\SeoAudit\AuditBuilder;
use Wizardstool\SeoAudit\Audits\DescriptionAudit;
use Wizardstool\SeoAudit\Audits\CanonicalUrlAudit;
use Wizardstool\SeoAudit\Audits\TitleAudit;
use Wizardstool\SeoAudit\AuditIssues;

$subAudits = [
    new TitleAudit(),
    new DescriptionAudit(),
    new CanonicalUrlAudit(),
];

$html = <<<'HTML'
<html>
    <head>
        <title>This is title</title>
        <meta name="description" content="This is document with description." />
        <link rel="canonical" href="https://my-second-url-for-test.com">
    </head>
</html>
HTML;

$audit     = new AuditBuilder('https://my-url-for-test.com', $html, $subAudits);
$audit->run();
$result = $audit->getAuditResult();
var_dump($result);

This dump is Audit result:

object(Wizardstool\SeoAudit\AuditResult)#6 (4) {
  ["title":"Wizardstool\SeoAudit\AuditResult":private]=>
  string(13) "This is title"
  ["description":"Wizardstool\SeoAudit\AuditResult":private]=>
  string(34) "This is document with description."
  ["canonicalUrl":"Wizardstool\SeoAudit\AuditResult":private]=>
  string(34) "https://my-second-url-for-test.com"
  ["issues":"Wizardstool\SeoAudit\AuditResult":private]=>
  array(1) {
    ["seo"]=>
    array(3) {
      ["Wizardstool\SeoAudit\Audits\TitleAudit"]=>
      array(1) {
        [4]=>
        array(1) {
          ["length"]=>
          int(13)
        }
      }
      ["Wizardstool\SeoAudit\Audits\DescriptionAudit"]=>
      array(1) {
        [4]=>
        array(1) {
          ["length"]=>
          int(34)
        }
      }
      ["Wizardstool\SeoAudit\Audits\CanonicalUrlAudit"]=>
      array(1) {
        [7]=>
        array(2) {
          ["canonical_url"]=>
          string(34) "https://my-second-url-for-test.com"
          ["page_url"]=>
          string(27) "https://my-url-for-test.com"
        }
      }
    }
  }
}

The first level Keys in array issues are audit type (seo, security, performance and etc.). The second level array keys are Audit classes e.g. Wizardstool\SeoAudit\Audits\TitleAudit and its keys are comes from \Wizardstool\SeoAudit\AuditIssues. For example 4 is from const \Wizardstool\SeoAudit\AuditIssues::TITLE_TOO_SHORT. So you can handle too short title like this:

$result = $audit->getAuditResult();

$titleTooShortResult = $result->getIssues()['seo'][TitleAudit::class][AuditIssues::TITLE_TOO_SHORT];
if (isset($titleTooShortResult['length'])) {
    echo sprintf('Title "%s" is too short, its length %d. It should be atleast %d characters.', $result->getTitle(),
        $titleTooShortResult['length'], (new TitleAudit())->getTitleMinLength());
}

Output:

Title "This is title" is too short, its length 13. It should be atleast 50 characters.

Customize audit

$titleAudit = new TitleAudit();
// setup custom title limits
$titleAudit->setTitleMinLength(45);
$titleAudit->setTitleMaxLength(70);

$subAudits = [
    $titleAudit,
    new DescriptionAudit(),
    new CanonicalUrlAudit(),
];

Tests

To execute tests: