PHP Based Web Crawler or JAVA Based Web Crawler [closed]

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i have some doubt about PHP based web crawlers,can it run like the java thread based one? i am asking it b开发者_如何学Cecause, in java the thread can be executed again and again, i dont think, PHP have something like thread function, can you guys please say, which web crawler will be more use full?A PHP Based or A Java Based

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Instead of writing your own use one of the following. Btw, Java based web crawlers are preferred. My fav Nutch.

Java based: Nutch, Heritrix, JSpider, JoBo (simple crawler)

PHP based: PHPCrawl

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In general, you will need to jump through more hoops to run long-running tasks in PHP, as it's much more of an request/response-based setup.