Question

我正在尝试将数据从MySQL数据库存储到本地SQLite数据库。问题是我得到了超过500字的艺术家描述。我可以在我的屏幕上打印艺术家ID和艺术家名称，但似乎无法显示艺术家描述，除非我使用substr（$ artist_description，0,397）。 0,397显示屏幕上的所有397个字符，但当我将其更改为398时，它不显示任何内容。

<?php

    $artist_id = $_GET['artist_id'];

    mysql_connect("localhost", "root", "")
        or die("Failed to connect to database.");
    mysql_select_db("testdb");

    $query = "SELECT * FROM artist WHERE artist_id=$artist_id";
    $result = mysql_query($query);
    $row = mysql_fetch_array($result);

    echo $row['artist_name'];
    echo '<br />';
    echo $row['artist_description'];

    $artist_name = $row['artist_name'];
    $artist_description = $row['artist_description'];

    ?>

    <!DOCTYPE HTML>
    <html>
    <head>
    <script type="text/javascript">
        var db = openDatabase('mydb', '3.0', 'Test DB', 20 * 1024 * 1024);
        var msg;
        db.transaction(function (tx) {
          tx.executeSql('CREATE TABLE IF NOT EXISTS LOGS (id UNIQUE, artist_name, artist_description TEXT)');
          tx.executeSql('INSERT INTO LOGS (id, artist_name, artist_description) VALUES ("<?=$artist_id?>", "<?=$artist_name?>", "<?=substr($artist_description, 0, 397)?>")');
          msg = '<p>Log message created and row inserted.</p>';
          document.querySelector('#status').innerHTML =  msg;
        });

        db.transaction(function (tx) {
          tx.executeSql('SELECT * FROM LOGS', [], function (tx, results) {
           var len = results.rows.length, i;
           msg = "<p>Found rows: " + len + "</p>";
           document.querySelector('#status').innerHTML +=  msg;
           for (i = 0; i < len; i++){
             msg = "<p><b>" + results.rows.item(i).id + "</b> " + results.rows.item(i).artist_name + "<br>" + results.rows.item(i).artist_description + "</p>";
             document.querySelector('#status').innerHTML +=  msg;
           }
         }, null);
        });
    </script>
    </head>
    <body>
    <div id="status" name="status">Status Message</div>
    </body>

</html>

*编辑：打印出'n，ó，＆amp;等

SQLITE超过397个字符

0 个答案: