PHP中是否有函数或命令来解决为什么未将数据插入sql数据库的问题？

Question

I've been trying to get images to insert into my db for two weeks now. Just wondering if there was any way to get specific info on why in order to troubleshoot it (by means of a PHP function or something of the sort).

To be clearer, I'm asking if there is a way to generate an error message describing exactly the reason the data was not inserted, rather than writing out if/else statements for each individual situation (such as if not connected to database, wrong data type, etc.)

I've avoided code specifics as the last two got marked down and I'm about to be banned. Thank you.

Answer 1

Yes there is, try mysql_error or mysqli_error

For example:

if (!mysqli_query($con,"INSERT INTO Persons (FirstName) VALUES ('Glenn')")){
    echo("Error description: " . mysqli_error($con));
}