Member Avatar for adnanahsan

i have to make a search engine for my client, but i am confusing about indexing websites to search engine database, please can any one tell me how can i achieve this goal? can any one tell me how can i make spider / crawler to do this ? please, I really need help my friends.
Thanks in advance

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  • Latest Post Latest Post by lordspace

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A concise, practical plan that fills gaps in the thread: building a crawler in PHP is feasible for a small-to-moderate project, but it helps to separate responsibilities and plan for politeness, storage, and indexing. provided tutorial pointers and was right to discourage trying to run a crawler from browser-side JavaScript; ’s suggestion to reuse Google’s search is a fast alternative but trades control and coverage.

Key components to implement and test independently:

  • Fetcher: HTTP client with timeouts, redirects, gzip support and a clear User-Agent.
  • Robots/sitemap handler: obey robots.txt and prefer sitemap.xml when present.
  • Frontier + scheduler: queue with domain-based rate limiting (politeness), depth/host limits, and seen-URL deduplication.
  • Parser: HTML -> DOM extraction (links, title, meta, alt text). For images/audio record URL, MIME, alt/title/ surrounding text; for audio, record ID3 metadata rather than attempting audio-content indexing.
  • Indexer/storage: store documents and metadata; use full-text search (DB fulltext, Sphinx, Lucene/Elasticsearch) or a simple inverted index for small projects.
  • Monitoring: logs, error handling, and incremental re-crawl policy.

Minimal PHP fetch + link-extract example (skeleton):

<?php
$ch = curl_init('https://example.com/');
curl_setopt_array($ch, [
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_USERAGENT => 'MySpider/1.0 (+http://example.com/contact)',
  CURLOPT_TIMEOUT => 10,
]);
$html = curl_exec($ch);
curl_close($ch);

$dom = new DOMDocument();
@$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
foreach ($xpath->query('//a[@href]') as $a) {
  $href = $a->getAttribute('href');
  // normalize and enqueue into frontier
  echo $href . PHP_EOL;
}

Practical cautions and tips: check Content-Length before downloading large binaries; respect robots.txt and site rate limits; add a contact email in the User-Agent; normalize URLs (scheme, host, trailing slash, query parameters) and compute content hashes to avoid duplicate indexing. For images/audio, extract EXIF or ID3 with existing PHP libraries rather than full-file downloads when possible. For production scale, split crawling (CURL workers) from indexing (separate service) and consider existing search engines to avoid rebuilding complex indexing features.

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Member Avatar for adnanahsan

can i build spider in PHP? is it possible? is there any information about spider in php? or any ready made php web spider which i can integerated to my search engine? it should spider websites, images, and musics etc.

Member Avatar for adnanahsan

thanks my friend i am really thankful to you, i am going to view those websites :)

Member Avatar for chaosprime

I can say with great conviction that this is the wrong forum. Whatever you wind up doing about your crawler, I sincerely doubt that you will do it in JavaScript. (I also hope and pray that this is the case, for your sake.)

Member Avatar for adnanahsan

but i will make it in php .. i am not much sure about it at the moment i will do more research.

Member Avatar for lordspace

You could integrate Google's search in that site.

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