title: how install curl php in centos
body: <p>i'm trying to install curl to my centos OS by yum
  when I check</p>
  <pre><code>curl --version
  </code></pre>
  <p>it shows</p>
  <pre><code>curl 7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.44 zlib/1.2.3 libidn/1.18 libssh2/1.4.2 Protocols: tftp ftp telnet dict ldap ldaps http file https ftps scp sftp Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz
  </code></pre>
  <p>but when I run <code>php -m</code> still doesn't gets curl lib.</p>
  <p>Or</p>
  <pre><code>Call to undefined function curl_init()
  </code></pre>
  <p>I had change file <strong>php.ini</strong> by drop <code>;</code> at <code>extension=php_curl.dll</code> and restart service httpd but doesn't seems to  work. Can someone tell me</p>