我正在通过 PDO 连接到 MySQL 数据库,但是当我尝试在 PHP 中执行 SQL 调用时,它失败并出现以下错误。当我回显 SQL 并在 MySQL Workbench 中运行它时,它返回的结果正是我所期望的。这是 $prepared->errorInfo()
失败时的输出:
Array (
[0] => 42000
[1] => 1064
[2] => You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near "5" at line 17
)
所以看起来准备好的语句以及在执行时向其传递值有问题,但我不确定是什么。 http://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html#error_er_parse_error除了告诉我同样的问题之外并没有真正的帮助。
function __construct($params = array()) {
$DB = new PDO('mysql:host='.$config['host'].';port='.$config['port'].';dbname='.$config['name'], $config['user'], $config['pswd']);
if (!$DB) {
throw new Exception('Could not connect to database');
}
$type = $params['topic'];
if (isset($params['topic']) && $params['topic'] !== '') {
$typeSlugSql = "SELECT id from topics WHERE slug = ? LIMIT 1";
$prepared = $DB->prepare($topicSlugSql);
$list = $prepared->execute(array($params['topic'])); //NOTE: this is working correctly and returns the ID I expect
if (!$list) {
throw new Exception('topic slug execute failed');
}
$row = $prepared->fetch(PDO::FETCH_ASSOC);
$topic = $row['id']; //id is correctly 6 at this point
}
//generate SQL query
$sql = "SELECT
articles.id AS id,
articles.slug AS slug,
articles.title AS title,
articles.headline AS headline,
articles.description AS description,
articles.keywords AS keywords,
articles.content AS content,
DATE(articles.published_date) AS date,
articles.created AS created
FROM
articles articles
WHERE
articles.published_date <= CURRENT_TIMESTAMP
AND (articles.published IS NOT NULL OR articles.published = 1)
ORDER BY
articles.published_date DESC LIMIT 0 , ?";
//run the query and get the feed data
$prepared = $DB->prepare($sql);
$items = $prepared->execute(array(5)); //this will make the SQL fail...
echo $sql;
if (!$items) {
print_r($DB->errorInfo()); //this prints the 'errorInfo' listed above
throw new Exception('execution error...');
}
$options = array('ellipsis' => '...', 'exact' => false, 'html' => false);
while ($row = $prepared->fetch(PDO::FETCH_ASSOC)) {
array_push($this->resources, new Resource($row['title'], $row['slug'], $row['date'], $this->cleanAndTruncate($row['content'])));
}
}
最奇怪的部分是 $prepared->execute(array($params['type']))
正常工作并返回我期望的 ID。同样,如果我复制/粘贴 echo
的 SQL 并将 ?
替换为 5
,它会在 MySQL Workbench 中按预期工作。如果我这样做:
$sql = "SELECT
articles.id AS id,
articles.slug AS slug,
articles.title AS title,
articles.headline AS headline,
articles.description AS description,
articles.keywords AS keywords,
articles.content AS content,
DATE(articles.published_date) AS date,
articles.created AS created
FROM
articles articles
WHERE
articles.published_date <= CURRENT_TIMESTAMP
AND (articles.published IS NOT NULL OR articles.published = 1)
ORDER BY
articles.published_date DESC LIMIT 0 , 5";
$prepared = $DB->prepare($sql);
$items = $prepared->execute();
它适用于 PDO 和 MySQL Workbench,但我需要根据传入的参数更改 LIMIT
。有什么建议可以找出是什么破坏了这个吗?
最佳答案
试试这个:
$sql = "SELECT
articles.id AS id,
articles.slug AS slug,
articles.title AS title,
articles.headline AS headline,
articles.description AS description,
articles.keywords AS keywords,
articles.content AS content,
DATE(articles.published_date) AS date,
articles.created AS created
FROM
articles articles
WHERE
articles.published_date <= CURRENT_TIMESTAMP
AND (articles.published IS NOT NULL OR articles.published = 1)
ORDER BY
articles.published_date DESC LIMIT :limit , 5";
$stmt = $DB->prepare($sql);
$limit = 5;
$stmt->bindParam(':limit', $limit, PDO::PARAM_INT);
$items = $stmt->execute();
关于php - PDO 调用在 PHP 中失败,但在 MySQL Workbench 中成功执行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27554309/