= 8.3.0)cubrid_is_instance — Check whether the instance pointed by OID exists說明cubrid_is_instance(resource $conn_ident"> 
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    cubrid_is_instance
    
  
    (PECL CUBRID >= 8.3.0)
    cubrid_is_instance — Check whether the instance pointed by OID exists
    

 
    

 
    
  
    說明
    
  
    
   cubrid_is_instance(resource $conn_identifier, string $oid): int
    

  
    
    The cubrid_is_instance() function is used to check
    whether the instance pointed by the given oid
    exists or not.
  
    
 
    


 
    
  
    參數(shù)
    
  
    
  
    
    
  
    
conn_identifier
    

  
    

    Connection identifier.
    

   
   
  
    
oid
    

  
    

    OID of the instance that you want to check the existence.
    

   
  
    

  
    
 
    


 
    
  
    返回值
    
  
    
    1, if such instance exists; 
  
    
    
    
    0, if such instance does not exist; 
  
    
    
    
    -1, in case of error
  
    
 
    


 
    
  
    范例
    
  
    
   
    示例 #1 cubrid_is_instance() example
    
   
    

    
<?php
    $conn     = cubrid_connect("localhost", 33000, "demodb");

    $sql = <<<EOD
    SELECT host_year, medal, game_date 
    FROM game 
    WHERE athlete_code IN 
        (SELECT code FROM athlete WHERE name='Thorpe Ian');
    EOD;

    $req = cubrid_execute($conn, $sql, CUBRID_INCLUDE_OID);
    $oid = cubrid_current_oid($req);

    $res = cubrid_is_instance ($conn, $oid);
    if (    $res == 1) {
        echo     "Instance pointed by $oid exists.\n";
    } else if (    $res == 0){
        echo     "Instance pointed by $oid doesn't exist.\n";
    } else {
        echo     "error\n";
    }

    cubrid_disconnect($conn);
    ?>
    

    
   
    

    
    以上例程會(huì)輸出：
    
    
    

    Instance pointed by @0|0|0 doesn't exist.

    
   
    
  
    
 
    


   
    
  
    參見