เขียน php อย่างไรเพื่อให้ค่าตัวแปรมาต่อกันในรูปแบบของคำสั่ง sql

Private Sub INT_Data()
        Dim rs As ADODB.Recordset
        Dim sSql As String, sEmp As String
        On Error GoTo msgErr:
        
        If cboCust_type.Text <> "" Then

                sSql = "SELECT DISTINCT b.SEQ, f.CUST_NAME,b.REF_NO, g.GOODS_ID, g.QTY,b.AGENT_NAME, f.TEL2, f.AMPHUR1,b.CUST_TYPE, " & _
                                " e.EMP_NAME,b.time_confirm,b.in_time,b.out_time,b.staff_in,b.job_num,b.output,b.descr,b.problem,b.sale_inform,a.pl_no,nvl(b.amount,0)amount,to_char(a.pl_date,'dd/mm/yyyy')pl_date " & _
                        " FROM   SER_PLAN_MASTER a inner join SER_PLAN_DETAIL b On a.pl_no=b.pl_no " & _
                                " left outer join SER_JOB c On b.ref_no = c.job_no " & _
                                " left outer join SER_PLAN_EMP d On b.pl_no=d.pl_no " & _
                                " left outer join SER_EMPLOYEE e On d.emp_id = e.emp_id " & _
                                " left outer join SER_CUSTOMER f On c.cust_no = f.cust_no " & _
                                " left outer join SER_JOB_DETAIL g On c.job_no = g.job_no " & _
                        " Where nvl(a.pl_status,'N')='N' and a.pl_date between to_date('" & Left(dtpDate1, 6) & Year(dtpDate1) & "','dd/mm/yyyy') and to_date('" & Left(dtpDate2, 6) & Year(dtpDate2) & "','dd/mm/yyyy')" & _
                                " and b.cust_type = '" & cboCust_type.Text & "'"
        Else            'All
                sSql = "SELECT DISTINCT b.SEQ, f.CUST_NAME,b.REF_NO, g.GOODS_ID, g.QTY,b.AGENT_NAME, f.TEL2, f.AMPHUR1,b.CUST_TYPE, " & _
                                " e.EMP_NAME,b.time_confirm,b.in_time,b.out_time,b.staff_in,b.job_num,b.output,b.descr,b.problem,b.sale_inform,a.pl_no,nvl(b.amount,0)amount,to_char(a.pl_date,'dd/mm/yyyy')pl_date " & _
                        " FROM   SER_PLAN_MASTER a inner join SER_PLAN_DETAIL b On a.pl_no=b.pl_no " & _
                                " left outer join SER_JOB c On b.ref_no = c.job_no " & _
                                " left outer join SER_PLAN_EMP d On b.pl_no=d.pl_no " & _
                                " left outer join SER_EMPLOYEE e On d.emp_id = e.emp_id " & _
                                " left outer join SER_CUSTOMER f On c.cust_no = f.cust_no " & _
                                " left outer join SER_JOB_DETAIL g On c.job_no = g.job_no " & _
                        " Where nvl(a.pl_status,'N')='N' and a.pl_date between to_date('" & Left(dtpDate1, 6) & Year(dtpDate1) & "','dd/mm/yyyy') and to_date('" & Left(dtpDate2, 6) & Year(dtpDate2) & "','dd/mm/yyyy')"
        End If

        If cboResult.Text <> "" Then
                If cboResult.Text = "จบ" Then sSql = sSql & " and b.output in ('สั่งผลิต','เสนอราคา')"
                If cboResult.Text = "ไม่จบ" Then sSql = sSql & " and nvl(b.output,'ไม่จบ') in ('ไม่จบ','เข้าอีก')"
        End If

        If Left(sSiteCode, 1) = "b" Then
                sSql = sSql & " And a.pl_type = '" & Cbo_TrimString(cboPL_type) & "'"
        End If

        sSql = sSql & " And a.site_code = '" & Left(sSiteCode, 1) & "'"
        sSql = sSql & " ORDER BY a.pl_no,b.seq"

        'Debug.Print sSql ให้ได้ค่า sSql แบบนำมาต่อกันในรูปแบบของ PHP ครับ