function generateDocCode() { 
$wf_id = self::WORKFLOW_ID; 
$doc_code = ""; 
$link = mssql_connect($this->cfg->db->params->host, $this->cfg->db->params->username, $this->cfg->db->params->password) or die("Can't connect sql server"); 
mssql_select_db($this->cfg->db->params->dbname, $link) or die("Select database failure"); 
$stmt = mssql_init("GenerateDocCode", $link) or die("initialize stored procedure failure"); 
mssql_bind($stmt, "@wf_id", $wf_id, SQLINT4); 
mssql_bind($stmt, "@doc_code", $doc_code, SQLVARCHAR, true); 
mssql_execute($stmt, false); 
//print "Doc Code is: ".$doc_code; 
return $doc_code; 
}

先调用mssql_init语句用于初始化存储过程，而后调用mssql_bind语句指定存储过程参数，最后调用mssql_execute执行存储过程。