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我有以下代码：

foreach($RSS_DOC->channel->item as $RSSitem) {

    $item_id    = md5(str_replace(array('\'', '"'), '', $RSSitem->title));
    $fetch_date = date("Y-m-j G:i:s"); //NOTE: we don't use a DB SQL function so its database independant
    $item_title = str_replace(array('\'', '"', '(', ')', ' - ', '.'), '', $RSSitem->title); 
    $item_date  = date("Y-m-j G:i:s", strtotime($RSSitem->pubDate));
    $item_url   = $RSSitem->link;

    $words = explode(' ', $item_title);

    echo "Processing item '" , $item_id , "' on " , $fetch_date     , "<br/>";
    echo $item_title, " - ";
    echo $item_date, "<br/>";
    echo $item_url, "<br/>";

    // Does record already exist? Only insert if new item...

    $item_exists_sql = "SELECT item_id FROM rssingest where item_id = '" . $item_id . "'";
    $item_exists = mysql_query($item_exists_sql, $db);
    if(mysql_num_rows($item_exists) < 1) {

        echo "<font color=green>Inserting new item..</font><br/>";
        $item_insert_sql = "INSERT INTO rssingest(item_id, feed_url, item_title, item_date, item_url, fetch_date) VALUES ('" . $item_id . "', '" . $feed_url . "', '" . $item_title . "', '" . $item_date . "', '" . $item_url . "', '" . $fetch_date . "')";
        $insert_item = mysql_query($item_insert_sql, $db);

        foreach ($words as $value) {

            $word_exists_sql = "SELECT id FROM words WHERE word = '" . $value . "'";
            $word_exists = mysql_query($word_exists_sql, $db);

            if (mysql_num_rows($word_exists) < 1) {
                $word_insert_sql = "INSERT INTO words(word, count) VALUES ('" . $value . "', '1')";
                $insert_word = mysql_query($word_insert_sql, $db);
                echo "<font color=green>Inserting word ".$value."..</font><br/>";

            } else {
                $word_update_sql = "UPDATE words SET count = count+1 WHERE word = '" . $value . "'";
                $update_word = mysql_query($word_update_sql, $db);
                echo "<font color=green>Updating count for word ".$value."..</font><br/>";
            }
        }



    } else {
        echo "<font color=blue>Not inserting existing item..</font><br/>";
    }

    echo "<br/>";
}

第一个 foreach 按预期工作，第二个只在 DB 中插入第一个 rss 项的第一个单词，即使其余单词的 echo 显示正确。

我错过了什么？

4

1 回答 1

1 
$word_insert_sql = "INSERT INTO words(word, count) VALUES ('" . $value . "', count+1)";

那到底count + 1应该是从哪里来的。当然应该只是1。

在任何情况下，如果您尝试进行数据库操作，通常最好在继续之前检查它们是否有效。

于 2012-12-09T11:57:19.833 回答