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我在一个 php 文件上设置了一个 cron-job。我还设置了电子邮件，以便在执行 cron 时收到电子邮件警报。所以无论我在那个 php 文件中放入echo的任何语句，都会显示在电子邮件正文中。

我怀疑它不是检查代码条件，它只是流经代码并在邮件正文中显示回显语句。

看下面的代码-：

$query_update = "UPDATE  tier_price tp 
JOIN   catalog_product_entity cpe   ON    cpe.entity_id = tp.entity_id    
AND    cpe.name LIKE '$col2'   AND   website_id = $col4 
JOIN   customer_group cg   ON    cg.customer_group_id = tp.customer_group_id   AND   cg.customer_group_code =  $col1 SET cpetp.value = ".$col3.";";
mysql_query($query_update);
$count = mysql_affected_rows();
if($count == 1)
{
         echo "<br />"."Price for customer group $col1 for item $col2 is updated to $col3";
}
if($count == 0)
{
       $qry_fetch_product = "SELECT entity_id FROM catalog_product_entity WHERE name = '$col2'";
       $res_qry_fetch_product = mysql_query($qry_fetch_product);
       while($row = mysql_fetch_array($res_qry_fetch_product))
       {
        $entity_id = $row["entity_id"];
       }

       $qry_fetch_grp_code = "SELECT customer_group_id FROM customer_group WHERE customer_group_code = $col1 ";
       $res_qry_fetch = mysql_query($qry_fetch_grp_code);
       while($row = mysql_fetch_array($res_qry_fetch))
       {
        $customer_group_id = $row["customer_group_id"];     
       }

       $qry_insert_base = "INSERT into tier_price(entity_id,customer_group_id,qty,value,website_id) VALUES ($entity_id,$customer_group_id,1,$col3,$col4)";
       $res_qry_insert_base = mysql_query($qry_insert_base);    

  echo "<br />"."Price $col3 for customer group $col1 for item $col2 is inserted";
}

我收到的邮件警报包含-：

<br />Price for customer group 101 for item abc is updated to 252<br />Price 252 for customer group 101 for item abc is inserted
<br />Price for customer group 102 for item pqr is updated to 252.49<br />Price 252.49 for customer group 102 for item pqr is inserted
<br />Price for customer group 103 for item xyz is updated to 15.5<br />Price 15.5 for customer group 103 for item xyz is inserted

所以我的怀疑是，它在两个循环中都存在，这不应该是真实的情况。好像查询获取更新计数变为 1，所以它必须只通过 if($count == 1) 循环&类似地，如果没有更新计数变为 0，但从 o/p 我们可以看到它在两个循环中都进行，我们可以看到电子邮件警报中的两行，这非常令人困惑......

任何人都可以提供解决方案来避免这种情况......这样如果发生更新，它会在邮件中显示更新或插入发生，它会显示代码中的插入语句......

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1 回答 1

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请检查 http://php.net/manual/en/function.mysql-affected-rows.php 使用类似下面的东西

<?php
$count = mysql_affected_rows();
if(mysql_affected_rows())
{
}else{

}
?>
于 2012-05-21T11:59:51.140 回答