Question

我有我的表名爲sup_mon：

genmat_id mat_name Stock_balance 
1   bar   50 
5   steel   10 
20   bolt   5 

HTML：

 <?php 
     $resource2=mysql_query("SELECT * FROM genmaterial WHERE mat_name='$mat' AND size='$unit' ORDER BY genmat_id DESC limit 0,1",$con); 

     while($rows2=mysql_fetch_array($resource2)) 
      { 

      ?> 
     <form name="stockout" method="post" action="stock_out.php"> 
       <label><b>Material</b></label> 
       <input maxlength="25" type="text" readonly name="material" id="material" required="required" style="height:20px" value="<?php echo $rows['mat_name']; ?>" > 

      <input type="number" name="stock_out"/> 
<input type="submit" name="submit" value="submit"/> 
     </form> 
    <?php };?> 

如何檢查從sup_mon表第一stock_balance在材料材料文本框從HTML？並在該特定材料的stock_balance小於10時提示重新排序消息？

Answer 1

您將需要添加的環內的第二查詢，以檢查是否stock_balance小於10是這樣的：

<?php 
    $resource2=mysql_query("SELECT * FROM genmaterial WHERE mat_name='$mat' AND size='$unit' ORDER BY genmat_id DESC limit 0,1",$con); 

    while($rows2=mysql_fetch_array($resource2)) 
     { 
      $resource3=mysql_query("SELECT * FROM sup_mon WHERE genmat_id = '" . $rows2['genmat_id'] . "'",$con); 
      $row3 = mysql_fetch_array($resource3); 
      if($row3['Stock_balance'] < 10) 
      { 
       echo "Stock balance is less then 10 please reorder"; 
       header("refresh: 5; order.php"); 
      } 
     ?> 
    <form name="stockout" method="post" action="stock_out.php"> 
      <label><b>Material</b></label> 
      <input maxlength="25" type="text" readonly name="material" id="material" required="required" style="height:20px" value="<?php echo $rows['mat_name']; ?>" > 

     <input type="number" name="stock_out"/> 
<input type="submit" name="submit" value="submit"/> 
    </form> 
<?php }; ?>