排除PHP / MSSQL连接

我有php脚本，是发送值给它到一个MSSQL数据库。它在大约70%的时间内工作(应该有大约100条记录，我将看到大约70条)。我看不出有什么规律。我不是在找别人帮忙复习我已有的日志;我需要知道应该在哪里查找错误。php很简单，使用mssql_query、mssql_num_rows和mssql_fetch_array。php.ini中的超时没有从默认的60秒改变，尽管我刚刚将其设置为240秒(如果这修复了一切，我会更新帖子)。一旦脚本被调用，我就无法返回任何东西;每个响应，无论是否有错误，都必须是相同的。我可以以某种方式记录mssql_query函数的详细信息吗?或者是否有来自SQL服务器的响应，我可以监听?我看过说明书，还没见过这样的事。任何帮助将不胜感激!我需要尽快处理这件事。

编辑-我不能运行mssql_showlastmessage，因为我不能返回任何东西，但是，事情会中断。下面是完整的代码:

<?php
//request xml cdr from switchvox
error_reporting(E_ALL);
//include switchvox libraries
require_once("SwitchvoxRequest.php");
//define sql connection stuff
$db_host = "dbhost";
$db_user = "dbuser";
$db_pass = "dbsecret";
$db = "db";
$table_sr = "tblsr";
$table_cd = "tblcmrd";
$link = mssql_connect($db_host, $db_user, $db_pass);
$err = "";
//make sure we can connect
if (!$link || !mssql_select_db($db, $link))
        {
            die("<response></response>");
        }
//define pbx connection stuff
$sv_host = "pbx";
$sv_user = "user";
$sv_pass = "secret";
//get the extension from the pbx and format it
$ext = $_GET['ext'];
$ext2 = $_GET['ext2'];
$jobid = $_GET['jobid'];
$et = $_GET['et'];
if(!$ext2)
        {
        $ext = substr($ext,-4,4);
        }
if(strlen($ext) > 4)
        {
        if(strlen($ext2) > 4)
                {
                die("<response></response>");
                }
        $ext = $ext2;
        }
//query the sr table to find the account ID of the extension we are referencing
$acid_sql = "SELECT * FROM $table_sr WHERE ext=$ext";
$acid_res = mssql_query($acid_sql);
$acida = mssql_fetch_array($acid_res, MSSQL_BOTH);
$acid = $acida['pbx_accountid'];
if (!$acid_res) 
        {
            die("<response></response>");
        }
//make sure there is a salesrep for the extension making the call
if (!$acid)
        {
            die("<response></response>");
        }
//get and format the time and date as YYYY-MM-DD
$date = date('Y') . "-" . date('m') . "-" . date('d');
//format the time as HH:MM:SS
$time = date('H') . ":" . date('i') . ":" . date('s');
//create a new request
$req = new SwitchvoxRequest($sv_host, $sv_user, $sv_pass);
$reqpar = array
        (
        'account_ids' => array
                (
                'account_id' => array
                        (
                        $acid
                        )
                ),
            'start_date' => array
                (
                $date . " " . "00:00:00"
                ),
        'end_date' =>  array
                (
                $date . " " . $time
                ),
        'sort_field' => array
                (
                ),
        'sort_order' => array
                (
                'DESC'
                )
        );
$res = $req -> send("switchvox.callLogs.search", $reqpar);
$result = $res->getResult();
$calls = $result['calls']['total_items'];
//check that there were calls to/from this account today
if(!$calls)
        {
        die("<response></response>");
        }
$latest = $result['calls']['call']['0'];
$callid = $latest['id'];
//check to see if the call has already been logged
$id_sql = "SELECT * FROM $table_cd WHERE callID='$callid'";
$id_res = mssql_query($id_sql);
$exid = mssql_fetch_array($id_res, MSSQL_ASSOC);
if (!$id_res) 
        {
    die("<response></response>");
        }
if($exid['callID'])
        {
        die("<response></response>");
        }
//define variables to be sent to the table
$from = $latest['from_number'];
$to = $latest['to_number'];
$durat = $latest['talk_duration'];
$start = $latest['start_time'];
$callid = $latest['id'];
$calltype = $latest['origination'];
//check the length of the cid/ext strings and swap if needed
if (strlen($from) > strlen($to))
        {
        $extension = $to;
        $phonenumber = $from;
        }
        else
        {
        $extension = $from;
        $phonenumber = $to;
        }
//insert the data into the table
$fi_sql = "INSERT INTO $table_cd (extension, phonenumber, calldatetime, duration, callID, calltype)     VALUES ($extension, $phonenumber, '$start', '$durat', '$callid', '$calltype')";
$fi_res = mssql_query($fi_sql);
if (!$fi_res) 
{
    die("<response></response>");
}
$sv_res = "<response></response>";
echo $sv_res;
?>

我意识到这是开放的sql注入。没关系。

edit -

我查看了数据库上的日志;当我期望有数据插入时，没有错误，甚至没有表明它尝试过。我将看一些将消息记录到syslog或php的东西。