php 中事务的用法（以及日志记录）

try catch只会捕捉程序异常！
Db::startTrans();
try{
self::changeUserMoney($data);
Db::commit();
exit(‘success’); //返回成功 不要删除哦
}catch (\Exception KaTeX parse error: Expected '}', got 'EOF' at end of input: …ts('error.txt',data.PHP_EOL,FILE_APPEND);
Db::rollback();
exit(‘fail’);
}
echo 1;
不管事务中是否出错，echo 1始终会执行；

public function index(){
Db::startTrans();
try{
Db::name(‘user’)->setDec(‘a’,1);
}catch (\Exception KaTeX parse error: Expected '}', got 'EOF' at end of input: … new Exception(exception->getMessage());
Log::error($exception->getMessage());
}
dump(‘这里始终会执行！’);
}
这种情况不会执行会抛出异常！后续不会执行！

public function index(){
Db::startTrans();
try{
Db::name(‘user’)->setDec(‘a’,1);
}catch (\Exception $exception){
$err = [
‘code’ => $exception->getCode(),
‘msg’ => $exception->getMessage(),
‘file’ => $exception->getFile(),
‘line’ => e x c e p t i o n − > g e t L i n e ( ) ] ; @ f i l e p u t c o n t e n t s ( ′ e r r o r . t x t ′ , j s o n e n c o d e ( exception->getLine() ]; @file_put_contents('error.txt', json_encode( exception−>getLine()];@filep​utc​ontents(′error.txt′,jsone​ncode(err).PHP_EOL ,FILE_APPEND);
}
}

下面这种情况，如果需要手动抛出的异常可在有异常的地方处理，然后会进入到catch中然后再进行抛出。
public function index(){
Db::startTrans();
try{
self::changeUserMoney();
Db::commit();
exit(‘success’);
}catch (\Exception KaTeX parse error: Expected '}', got 'EOF' at end of input: … new Exception(exception->getMessage());
$err = [
‘code’ => $exception->getCode(),
‘msg’ => $exception->getMessage(),
‘file’ => $exception->getFile(),
‘line’ => e x c e p t i o n − > g e t L i n e ( ) ] ; @ f i l e p u t c o n t e n t s ( ′ e r r o r . t x t ′ , j s o n e n c o d e ( exception->getLine() ]; @file_put_contents('error.txt', json_encode( exception−>getLine()];@filep​utc​ontents(′error.txt′,jsone​ncode(err).PHP_EOL ,FILE_APPEND);
}
}
public function changeUserMoney(){
r e s = D b : : n a m e ( ′ s a l e s m a n ′ ) − > w h e r e ( " i d " , 4 ) − > u p d a t e ( [ ′ s t a t u s ′ = > 0 ] ) ; i f ( e m p t y ( res=Db::name('salesman')->where("id",4)->update(['status'=>0]); if(empty( res=Db::name(′salesman′)−>where("id",4)−>update([′status′=>0]);if(empty(res)){
throw new Exception(‘更新失败！’);
}
}