Again ask the internet if you need help, or you want to verify a result.
Javascript
Next we search for JavaScript hacks. These usually only affect the frontend, but can leak back to the server in some cases. Again search on the command line, we’re looking for the following keywords:
eval
unescape
document.write
You, much like in the PHP code want to be looking for large blocks of obfuscated code, or anything unusual. Often you find blocks of code appened to minified assets.
SQL
We also want to get a database dump, then we’ll search through the raw SQL for the two previous searches.
If all goes well you’ll be able to eventually pinpoint the affected code and remove it.