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javascriptphpvalidationlamp

PHP and Javascript Input Field Validation

i got a LAMP enviornment.

Imagine the following scenario:

<form method="post" name="" id="" onsubmit="javascriptValidateFormUserInputs()">
...
</form>

As the name already says the javascriptValidateFormUserInputs(), validates inputs done by the user. If they are ok true is returned otherwise false.

If i manipulate the html clientside to onsubmit="true" no validation is done and the users invalid data is sent to the database.

I want to prevent that of course.

What to do ?

Thanks

Solution

  • If you are using php, then server-side validation is always better as client side validation can be tampered with.

    So you just need to check if $_POST("variable") has been validated otherwise return an error.

    You may follow this example - PHP Form Validation