Code Duplication    Length = 4-4 lines in 2 locations

web_interface/astpp/application/modules/invoices/controllers/invoices.php 2 locations

@@ 835-838 (lines=4) @@
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			  $query="select  sum(credit) as credit from invoice_details where invoiceid = ".$invoice_id." AND item_type !='PAYMENT' Group By invoiceid";  
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		//echo $query; exit;
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		$invoice_total_query=$this->db->query($query);
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		if ($invoice_total_query ->num_rows() > 0) {
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			$invoice_total_query= $invoice_total_query->result_array();
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			$total_debit=$invoice_total_query[0]['credit'];
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			}
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			$credit_total=$total_debit+$amount;
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	   //   echo  $debit; exit;
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		 if($debit >= $credit_total)   {
@@ 957-960 (lines=4) @@
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		$query="select  sum(credit) as credit from invoice_details where invoiceid = ".$invoice_id."  AND item_type !='PAYMENT'  Group By invoiceid"; 
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		//echo $query; exit;
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		$invoice_total_query=$this->db->query($query);
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		if ($invoice_total_query ->num_rows() > 0) {
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			$invoice_total_query= $invoice_total_query->result_array();
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			$total_debit=$invoice_total_query[0]['credit'];
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			}
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			$credit_total=$total_debit+$amount;
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		  // echo  $credit_total; exit;
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		 if($debit >= $credit_total)   {