我正在运行 PHP 7.2.16
不确定何时启动,PDO errorCode() 或 errorInfo()[0] 现在总是显示 00000,即使有错误也是如此
$pdo = new \PDO('mysql:host=localhost;dbname=mydb', 'root', 'pwd');
$sth = $pdo->prepare('select now() and this is a bad SQL where a - b from c');
$sth->execute();
$row = $sth->fetchAll();
$err = $sth->errorInfo();
echo $sth->errorCode();
print_r($row);
print_r($err);
结果如下:
00000Array
(
)
Array
(
[0] => 00000
[1] => 1064
[2] => You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'a bad SQL where a - b from c' at line 1
)
但是,我刚刚做了一个新的测试,通过删除 $sth->fetchAll()
或者在这一行之前得到错误,它正确显示:
Array
(
[0] => 42000
[1] => 1064
[2] => You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'a bad SQL where a - b from c' at line 1
)
好的 - 解决方案是:
get the error code immediately after
execute()
and before any fetch
最佳答案
我用 PHP 7.1.23 测试了这段代码:
$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
$sth = $pdo->prepare('select now() and this is a bad SQL where a - b from c');
if ($sth === false) {
echo "error on prepare()\n";
print_r($pdo->errorInfo());
}
if ($sth->execute() === false) {
echo "error on execute()\n";
print_r($sth->errorInfo());
}
输出:
error on execute()
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 'a bad SQL where a - b from c' at line 1
)
然后我测试了相同的代码,除了在禁用模拟准备之后:
$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
输出:
error on prepare()
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 'a bad SQL where a - b from c' at line 1
)
Fatal error: Uncaught Error: Call to a member function execute() on boolean
故事的寓意:
当使用模拟的准备好的语句时,
prepare()
是空操作,错误会延迟到execute()
。我建议禁用模拟准备,除非您使用的数据库不支持准备语句(我不知道任何 RDBMS 产品的当前版本不能执行真正的准备语句)。检查 prepare() 的错误时,使用
$pdo->errorInfo()
。检查 execute() 的错误时,使用
$stmt->errorInfo()
。
关于php - PDO 错误代码始终为 00000,即使出现错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55387802/