Answer Posted / dinesh g

What is Injection?
When a user is inserting any value into the text box, we
store that in a variable and place it in a query. If the
user also types any query within the text box our mysql will
run the query.

ex :

INSERT INTO students (name) VALUES ('Dinesh'); DROP TABLE
Students;

Here the user types his name as Dinesh also he write the
next query to drop the table. so this table is dropped if it
is present.

TO avoid it we use addslashes() else
mysql_real_escape_string() methods to escape from the users
query.

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