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        <h1 style="margin: 0px; float: left;">PHPCrawl webcrawler library/framework</h1>
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        <h3>Requirements</h3><br />
        At least the following requirements are necessary to run phpcrawl (v 0.8) in basic <b>single-process-mode</b>:
        <ul>
        <li>PHP 5 or later version</li>
        <li>PHP with <a href="http://php.net/manual/en/book.openssl.php">OpenSSL-support</a> for SSL-connections (https).<br>
            Not necessary for http-connects.</li>
        </ul>
        
        In order to run phpcrawl in <b>multi-process-mode</b>, some additional requirements are needed:
        <ul>
        <li>The multi-process mode only works on unix-based systems (linux)</li>
        <li>Scripts using the crawler in multi-process-mode have to be run from the commandline (PHP cli)</li>
        <li>The <a href="http://php.net/manual/en/pcntl.installation.php">PCNTL-extension</a> for php (process control) has to be installed and activated.</li>
        <li>The <a href="http://php.net/manual/en/sem.installation.php">SEMAPHORE-extension</a> for php has to be installed and activated.</li>
        <li>The <a href="http://de.php.net/manual/en/posix.installation.php">POSIX-extension</a> for php has to be installed and activated.</li>
        <li>The <a href="http://de2.php.net/manual/en/pdo.installation.php">PDO-extension</a> together with the SQLite-driver (PDO_SQLITE) has to be installed and activated.
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