Why is no error message reported for phppdosql statement errors?

{Code ...} in the set part of the update statement, the error setishandle1andnewarticle_id5 {code...} is written ...} it should be setishandle1. After newarticle_id5 is executed, the data table will not be changed, but there is no error message, which makes me get it for a long time. I don't know how to return it...

$cdb=new \PDO('mysql:dbname=crawler;host=127.0.0.1;charset=utf8','root','*****');$cdb->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);$sql='update jb51_ps_article set is_handle=1 and new_article_id=5 where id=71665';$state=$cdb->exec($sql);print_r($cdb->errorInfo());

Here, the set part of the update statement has the error set isHandle = 1 and newArticle_id = 5

$sql='update jb51_ps_article set is_handle=1 and new_article_id=5 where id=71665';

Set isHandle = 1, newArticle_id = 5

After execution, the data table will not be changed, but there is no error message, which makes me get it for a long time. I don't know what's going on?

The output information is as follows:

Reply content:

$cdb=new \PDO('mysql:dbname=crawler;host=127.0.0.1;charset=utf8','root','*****');$cdb->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);$sql='update jb51_ps_article set is_handle=1 and new_article_id=5 where id=71665';$state=$cdb->exec($sql);print_r($cdb->errorInfo());

Here, the set part of the update statement has the error set isHandle = 1 and newArticle_id = 5

$sql='update jb51_ps_article set is_handle=1 and new_article_id=5 where id=71665';

Set isHandle = 1, newArticle_id = 5

After execution, the data table will not be changed, but there is no error message, which makes me get it for a long time. I don't know what's going on?

The output information is as follows:

Set the error mode when creating a PDO object

$cdb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

Thentry/catchAn error can be captured.