Can I monitor which file executes the SQL statement?

Can I monitor which file executes the SQL statement? I took over the maintenance for the project, but the developer was not me, but found that the website may have a backdoor.
Data is often modified.
However, one file and one file cannot be found.
So I want to monitor which file to perform the operation records and analyze them ..
Is there any way?

Reply to discussion (solution)

Does your project use a database class?

Does your project use a database class?

Is conn. php called During database operations?

Does your project use a database class?

The include folder contains db_mysql.class.php.

Check whether mysql_query exists in files other than db_mysql.class.php.
If yes, it is all the places to be checked.

In the db_mysql.class.php file, the Chinese method contains the characters query, execute, insert, update, and fetch.
Join

file_put_contents('log.txt', print_r(debug_backtrace(), 1), FILE_APPEND);

You can see from the log.txt file where the SQL command is executed.

Just try again later.

Check whether mysql_query exists in files other than db_mysql.class.php.
If yes, it is all the places to be checked.

In the db_mysql.class.php file, the Chinese method contains the characters query, execute, insert, update, and fetch.
Join

file_put_contents('log.txt', print_r(debug_backtrace(), 1), FILE_APPEND);

You can see from the log.txt file where the SQL command is executed.

Thank you. However, I found that some php files also use some SQL statements. Can I directly write it in config. php?

Check whether mysql_query exists in files other than db_mysql.class.php.
If yes, it is all the places to be checked.

In the db_mysql.class.php file, the Chinese method contains the characters query, execute, insert, update, and fetch.
Join

file_put_contents('log.txt', print_r(debug_backtrace(), 1), FILE_APPEND);

You can see from the log.txt file where the SQL command is executed.

Array
(
[0] => Array
(
[File] =>/www/web/zlhk/public_html/include/conn. php
[Line] => 3
[Function] => include
)

[1] => Array
(
[File] =>/www/web/zlhk/public_html/madmin45/users. php
[Line] => 8
[Args] => Array
(
[0] =>/www/web/zlhk/public_html/include/conn. php
)

[Function] => include
)

)
Array

All similar data

You didn't do what I said!