Javascipt validation with php?

[shure2]

Hi,

I have build a system using php to add to the database by calling files containing all the relevant sql and mysql methods etc.

I would like to use javascript before the data is entered into the database as it looks a better approach, but I would like to keep my php code to add to the database.

Is there any way that I can perform a javascript function on a button click which in turn can cause the form to action the php?

[dagon]

lots of sites use js validation then php on the server-side, there is not problem with that, just make sure you don't rely on js, as the user can disable it.

[NogDog]

You can use the onsubmit attribute with the <form> tag to call a JavaScript function to do your client-side validation, then submit the form (e.g. via document.form_name.submit()). As Dagon points out, though, such validation is only as a convenience to the user and to reduce internet/server load, but you must still do any mandatory validation on the server side, as hackers can bypass your JavaScript (as well as legitimate users having it turned off for whatever reason).

[bradgrafelman]

NogDog wrote:

You can use the onsubmit attribute with the <form> tag to call a JavaScript function to do your client-side validation, then submit the form (e.g. via document.form_name.submit())

Actually, if your validation function is triggered via the onsubmit handler of the <form> tag, all you'd need to do is return true or false to allow or cancel the form submission, respectively.