Question

我在wordpress网站上查询结果。查询结果为:: -

h   COUNT( * )
0   7
1   5
2   2

查询是这样的： -

$sql = 'SELECT HOUR( `post_date` ) AS h, COUNT( * )'
        . ' FROM `wp_7tv8g5_posts`'
        . ' WHERE DATE( `post_date` ) = DATE( NOW( ) ) AND `guid`like \'%/questions/%\''
        . ' GROUP BY h';

Google图表APi需要以下格式的数据:: -

＆安培; CHT = LC ＆安培; chxt = X，Y ＆安培; chxl = 0：| 00：00 | 01：00 | 02：00 | 03：00 | 04：00 | 05：00 | 06：00 | 07：00 | 08：00 | 09：00 | 10：00 | 11：00 | 12：00 | 13：00 | 14：00 | 15：00 | 16：00 | 17：00 | 18：00 | 19：00 | 20：00 | 21：00 | 22：00 | 23 ：00 ＆安培; CHCO = FF9900，FF0000,0000FF” alt =“样本图表”/＆gt;

或类似的东西。

我的关键问题是如何阅读问题结果并构建谷歌图表api所期望的Feed /格式。

有什么想法吗？

干杯

乔纳森

Answer 1

以下是一个示例（PHP5，使用mysqli connector，您需要调整图形，颜色等类型）：

<?php

    require_once('includes/config.inc'); // defines MYSQL_* constants

    $db = new mysqli(MYSQL_HOST, MYSQL_USER, MYSQL_PASS, MYSQL_DB);

    if ($db->connect_error) {
        die('Connect failed: ' . $db->connect_error);
    }

    if (!$db->set_charset("utf8")) {
        die('Error loading character set utf8: ' . $db->error);
    }

    $sql = 'SELECT HOUR( `post_date` ) AS h, COUNT( * ) AS c'
         . ' FROM `wp_7tv8g5_posts`'
         . ' WHERE DATE( `post_date` ) = DATE( NOW( ) ) '
         . ' AND `guid` LIKE \'%/questions/%\''
         . ' GROUP BY h';
    $url = 'http://chart.apis.google.com/chart?';
    $point_size = 3;
    $data = array(
        'cht' => 's',
        'chxt' => 'x,y',
        'chs' => '700x300',
        'chd' => 't:',
        'chxr' => '',
        'chds' => '',
        'chxl' => '0:|'
    );
    $chxl = array();
    $chd = array(
        'x'=> array(), 
        'y' => array()
    );

    if ($stmt = $db->prepare($sql)) {
        /* execute query */
        if ($stmt->execute() === true) {
            /* bind result variables */
            $stmt->bind_result($h, $c);

            /* fetch values */
            while ($stmt->fetch()) {
                array_push($chd['x'], $h);
                array_push($chd['y'], $c);
            }
        } else {
            die('stmt error: ' . $stmt->error);
        }

        /* free result */
        $stmt->free_result();

        /* close statement */
        $stmt->close();
    } else {
        die('Cannot prepare stmt: ' . $db->error);
    }

    $db->close();

    foreach (range(0, 24) as $h) {
        array_push($chxl, sprintf('%02d', $h) . 'h');
    }

    $data['chxl'] .= implode($chxl, '|');
    $data['chd']  .= implode($chd['x'], ',') . '|' . implode($chd['y'], ',') . '|' . $point_size;
    $data['chxr'] .= sprintf('0,0,24|1,0,%d,1', max($chd['y']));
    $data['chds'] .= sprintf('0,24,0,%d', max($chd['y']));
    $url .= http_build_query($data, '', '&amp;'); // http_build_query is PHP5 only
?>

<img src='<?php echo $url; ?>' />
<pre><?php echo urldecode($url); ?></pre>

输出图片：

output image

输出网址：

http://chart.apis.google.com/chart?cht=s
&chxt=x,y&chs=700x300&chd=t:0,6,7,10,11,12,13,14,15,16,17,18,19,20,21,22|
2,1,1,1,2,1,5,3,2,3,4,1,1,1,1,1|3&chxr=0,0,24|1,0,5,1
&chds=0,24,0,5&chxl=0:|00h|01h|02h|03h|04h|05h|06h|07h|08h|09h|10h|11h|
12h|13h|14h|15h|16h|17h|18h|19h|20h|21h|22h|23h|24h

如何将查询结果转换为谷歌图表API的格式化字符串

1 个答案: