ifx_connect
  (PHP 4, PHP 5 < 5.2.1)
ifx_connect — Open Informix server connection
  
 
 
  说明
  
   ifx_connect
    ([ string $database
   [, string $userid
   [, string $password
  ]]] ) : resource
  
  
   In case a second call is made to ifx_connect() with the
   same arguments, no new link will be established, but instead, the link
   identifier of the already opened link will be returned.
  
  
   The link to the server will be closed as soon as the execution of the
   script ends, unless it's closed earlier by explicitly calling
   ifx_close().
  
  
 
  参数
  
   All of the arguments are optional, and if they're missing, defaults are
   taken from values supplied in php.ini (ifx.default_host for the host
   (Informix libraries will use INFORMIXSERVER environment
   value if not defined), ifx.default_user for user, ifx.default_password for
   the password (none if not defined).
  
  
   
    
     - 
database
- 
      
       The database name, as a string.
       
- 
userid
- 
      
       The username, as a string.
       
- 
password
- 
      
       The password, as a string.
       
 
 
  返回值
  
   Returns a connection identifier on success, or FALSE on error.
  
  
 
  范例
  
   
    Example #1 Connect to a Informix database
    
<?php
$conn_id = ifx_connect ("mydb@ol_srv1", "imyself", "mypassword");
?>