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在php脚本中,insert语句会自动失败,但会在提示下工作

insert postgresql php

Alexander Farber · 技术社区 · 15 年前

我在PostgreSQL 8.4.5中有下表:

snake=> create table gps (
id bytea check(length(id) = 16),
stamp timestamp DEFAULT current_timestamp,
pos point not null);

我可以从psql提示符将记录插入其中:

snake=> insert into gps (id, pos) values (decode(md5('x'), 'hex'), point(0, 0));
INSERT 0 1
snake=> insert into gps (id, pos) values (decode(md5('x'), 'hex'), point(0, 0));
INSERT 0 1

但由于某种原因,在下面列出的php脚本中插入失败,其结果返回为0。有人知道哪里出了什么问题,或者如何获得更多信息吗?我很惊讶没有抛出异常。

<?php

$id  = trim($_REQUEST['id']);
$lat = strtr(trim($_REQUEST['lat']), ',', '.');
$lon = strtr(trim($_REQUEST['lon']), ',', '.');

if (preg_match('/^[a-fA-F0-9]{32}$/', $id) &&
    preg_match('/^[+-]?[0-9.]+$/', $lat) &&
    preg_match('/^[+-]?[0-9.]+$/', $lon)) {

        try {
                $db = new PDO('pgsql:host=/tmp', 'snake', 'snake');
                $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

                $insert = $db->prepare("insert into gps (id, pos) values (decode(?, 'hex'), point(?, ?))");
                $res = $insert->execute($id, $lat, $lon);

                $select = $db->prepare("select encode(id, 'hex') as id, extract('epoch' from stamp) as stamp, pos[0] as lat, pos[1] as lon from gps");
                $select->execute();

                header('Content-Type: text/xml; charset=utf-8');
                print '<?xml version="1.0"?><gps>';
                while ($row = $select->fetch(PDO::FETCH_ASSOC)) {
                        printf('<pos id="%s" stamp="%u" lat="%f" lon="%f" />',
                            $row['id'], $row['stamp'], $row['lat'], $row['lon']);
                }
                printf('<res val="%d" />', $res);

                print '</gps>';
        } catch (Exception $e) {
                print 'Database problem: ' . $e->getMessage();
        }

} else {
        header('Content-Type: text/html; charset=utf-8');
        print '<html>
<body>
<form method="post">
<p>Id: <input type="text" name="id" size=32 maxlength=32 /></p>
<p>Latitude: <input type="text" name="lat" /></p>
<p>Longitude: <input type="text" name="lon" /></p>
<p><input type="submit" value="Save" /></p>
</form>
</body>
</html>
';

}

?>

我得到的输出表明结果为0:

<gps>
<pos id="0cc175b9c0f1b6a831c399e269772661" stamp="1287306960" lat="51.000000" lon="7.000000"/>
<pos id="0cc175b9c0f1b6a831c399e269772661" stamp="1287323377" lat="51.000000" lon="7.000000"/>
<pos id="92eb5ffee6ae2fec3ad71c777531578f" stamp="1287323381" lat="51.000000" lon="7.000000"/>
<pos id="92eb5ffee6ae2fec3ad71c777531578f" stamp="1287323442" lat="51.300000" lon="7.000000"/>
<pos id="92eb5ffee6ae2fec3ad71c777531578f" stamp="1287325610" lat="51.300000" lon="7.000000"/>
<pos id="92eb5ffee6ae2fec3ad71c777531578f" stamp="1287325612" lat="51.300000" lon="7.000000"/>
<pos id="9dd4e461268c8034f5c8564e155c67a6" stamp="1287325692" lat="0.000000" lon="0.000000"/>
<res val="0"/>
</gps>

当做, 亚历克斯

附言:这是我目前的剧本,看起来不错-

<?php

$id  = trim($_REQUEST['id']);
$lat = strtr(trim($_REQUEST['lat']), ',', '.');
$lng = strtr(trim($_REQUEST['lng']), ',', '.');

if (preg_match('/^[a-fA-F0-9]{32}$/', $id) &&
    preg_match('/^[+-]?[0-9.]+$/', $lat) &&
    preg_match('/^[+-]?[0-9.]+$/', $lng)) {

        try {
                # enable persistent connections and throw exception on errors
                $options = array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                                 PDO::ATTR_PERSISTENT => true);

                $db = new PDO('pgsql:host=/tmp dbname=snake', 'snake', 'snake', $options);

                #$db->exec('create table gps (id bytea check(length(id) = 16), stamp timestamp DEFAULT current_timestamp, pos point not null)');

                $insert = $db->prepare("insert into gps (id, pos) values (decode(?, 'hex'), point(?, ?))");
                $insert->execute(array($id, $lat, $lng));

                $select = $db->prepare("select encode(id, 'hex') as id, extract('epoch' from stamp) as stamp, pos[0] as lat, pos[1] as lng from gps");
                $select->execute();

                header('Content-Type: text/xml; charset=utf-8');
                print '<?xml version="1.0"?><gps>';
                while ($row = $select->fetch(PDO::FETCH_ASSOC)) {
                        printf('<pos id="%s" stamp="%u" lat="%f" lng="%f" />',
                            $row['id'], $row['stamp'], $row['lat'], $row['lng']);
                }
                print '</gps>';
        } catch (Exception $e) {
                print 'Database problem: ' . $e->getMessage();
        }

} else {
        header('Content-Type: text/html; charset=utf-8');
        print '<html>
<body>
<form method="post">
<p>Id: <input type="text" name="id" size=32 maxlength=32 /></p>
<p>Latitude: <input type="text" name="lat" /></p>
<p>Longitude: <input type="text" name="lng" /></p>
<p><input type="submit" value="Save" /></p>
</form>
</body>
</html>
';
}

?>

1 回复 | 直到 15 年前

lonesomeday 15 年前

PDOStatement->insert() 使用参数数组,而不是多个参数:

$res = $insert->execute($id, array($lat, $lon));

见 the manual .