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Filename : check-item-stock-availability.php
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<?php

 include_once("../config.php");
 
$totalitem_qty=0;
$total_invoice_item_qty=0;
$remainStock=0;
 
if( isset($_POST['item_name_row_id']) ){
    $item_name_row_id = mysqli_real_escape_string( $conn, $_POST['item_name_row_id'] );
    $sqlGetItem = "SELECT * FROM `inventory` where `id` = '$item_name_row_id'";
}
if( isset($_POST['txtitemcode']) ){
    $item_codes = mysqli_real_escape_string( $conn, $_POST['txtitemcode'] );
    $sqlGetItem = "SELECT * FROM `inventory` where `item_code` = '$item_codes'";
}

$resultGetItem = mysqli_query($conn,$sqlGetItem);
$count = mysqli_num_rows( $resultGetItem );
if($count){
    $rowGetItem = mysqli_fetch_array($resultGetItem);
    $item_code = $rowGetItem['item_code']; 
            
    $item_qty = $rowGetItem['item_qty'];  
         
    $totalitem_qty=$totalitem_qty+$item_qty;
    
    $sqld1 = "SELECT sum(`qty`) as `total_invoice_item_qty` FROM `invoice_item` where `item_code` = '$item_code' AND `marge_status` != 'yes' GROUP by `item_code`";
    $resultd1 = mysqli_query($conn,$sqld1);
    $count1 = mysqli_num_rows( $resultd1 );
    if($count1){
    $result_row = mysqli_fetch_array($resultd1);
    $total_invoice_item_qty = $result_row['total_invoice_item_qty'];
    }else{
        $total_invoice_item_qty=0;
    }
}else{
    $totalitem_qty=0;
    $total_invoice_item_qty=0;
}

$remainStock=$totalitem_qty-$total_invoice_item_qty;
 
    if ( $count) {
        
        $msg['status'] = "true";
        $msg['instock_itemz'] = (int)$remainStock;
        $msg['msg'] = "Correct" ;

        echo json_encode( $msg );
    } else {
        $msg['status'] = "false";
        $msg['instock_itemz'] = "0";
        $msg['msg'] = "wrong" ;
        echo json_encode( $msg );
    }
 
 
 
 
?>