php pdo sql语句错误为何没报错误信息
<code>$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()); </code>
这里的update语句的set部分写错了set ishandle=1 and newarticle_id=5
<code>$sql='update jb51_ps_article set is_handle=1 and new_article_id=5 where id=71665';</code>
应该为set ishandle=1,newarticle_id=5
执行后数据表不会更改,但是没有任何错误信息,害得我弄了半天,不知道是怎么回事?
下面是输出信息:
回复内容:
<code>$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()); </code>
这里的update语句的set部分写错了set ishandle=1 and newarticle_id=5
<code>$sql='update jb51_ps_article set is_handle=1 and new_article_id=5 where id=71665';</code>
应该为set ishandle=1,newarticle_id=5
执行后数据表不会更改,但是没有任何错误信息,害得我弄了半天,不知道是怎么回事?
下面是输出信息:
创建PDO对象的时候设置一下错误模式
<code>$cdb->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);</code>
然后try/catch
一下就可以捕获到错误了

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