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let me know how to solve this error

What I have tried:
Updated 8-Apr-21 0:49am
Richard MacCutchan 8-Apr-21 6:05am    
fix the code on line 11.

1 solution

Simple: don't use string concatenation to build SQL queries. It can an will leave you vulnerable to SQL Injection[^].

PHP: SQL Injection - Manual[^]

Beyond that, if you want anyone to help you fix your code, you need to show the relevant parts of your code. Which you haven't done. So nobody can help you.
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