#This update operation returns the number of rows in the result $data and $data->rowCount(); what is the difference? Aren’t they both returning influence functions?
In addition: medoo update operation,
Update successful:
If the data changes, return the number of rows $data=1
If the data does not change, the number of rows returned $data=0;
Update failure:
The number of rows returned $data is also 0. How to make if judgment, update failure and update success ( (data has not changed) the return value is the same, how to write the judgment
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
update() performs an update operation, then the affected record stored in $data is not a PDO object;
rowCound() should be called on the pdo object;
Please check the $data type, var_dump() or gettype()