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  <refentry id="function.sybase-pconnect">
   <refnamediv>
    <refname>sybase_pconnect</refname>
    <refpurpose>Open persistent Sybase connection</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>resource</type><methodname>sybase_pconnect</methodname>
      <methodparam choice="opt"><type>string</type><parameter>servername</parameter></methodparam>
      <methodparam choice="opt"><type>string</type><parameter>username</parameter></methodparam>
      <methodparam choice="opt"><type>string</type><parameter>password</parameter></methodparam>
      <methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
      <methodparam choice="opt"><type>string</type><parameter>appname</parameter></methodparam>
     </methodsynopsis>
    <para> 
     Returns a positive Sybase persistent link identifier on success,
     or &false; on error.
    </para>
    <para>
     <function>sybase_pconnect</function> acts very much like
     <function>sybase_connect</function> with two major differences.
    </para>
    <para> 
     First, when connecting, the function would first try to find a
     (persistent) link that's already open with the same host,
     username and password.  If one is found, an identifier for it
     will be returned instead of opening a new connection.
    </para>
    <para> 
     Second, the connection to the SQL server will not be closed when
     the execution of the script ends.  Instead, the link will remain
     open for future use (<function>sybase_close</function> will not
     close links established by <function>sybase_pconnect()</function>).
    </para>
    <para> 
     This type of links is therefore called 'persistent'.
    </para>
    <para>
     See also <function>sybase_connect</function>.
    </para>
   </refsect1>
  </refentry>

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