mbstring.so and curl.so can't be loaded by PHP under Ubuntu <p>I download PHP source code to build and install it. </p> <p>But <strong>mbstring.so</strong> and <strong>curl.so</strong> can not be loaded by PHP.</p> <ol> <li>I've remove ; from php.ini</li> <li><strong>mbstring.so</strong> and <strong>curl.so</strong> exist in extension folder</li> <li>other extension files can be loaded. I've tested with <strong>gd.so</strong>. I remove ; before gd.so, it can be see in phpinfo, I add ;, gd.so is hidden in phpinfo.</li> </ol> <p>Anybody know why?</p> <p>PHP version is <strong>5.4.13</strong>.</p>