Yes/No alert box. Php/Javascript

[lopes_andre]

Hi,

 

I need to do a Confirmation before delete some rows from the database. I think a alert box in javascript will do the job but I don't know how to start this...

 

I have a link like this:

 

<a href="url">Remove</a> 

 

How can I call the javascript code to deal with the Yes/No input from the user.

 

There are some tutorials that could help me? I'am a little bit lost.

 

Best Regards,

[syed]

Here's some basic js

 

function confirmDelete(id){

 

var response = confirm("Are you sure you want to delete this item?");

 

if (response){

window.location = "thefile.php?id=" + id + "&action=delete";

}

}

 

</script>

 

<input type="button" onclick="confirmDelete(34)" value="Delete" />

 

I would use Ajax for this, rather than the above code.

[lopes_andre]

Hi, thanks for the reply.

 

One question. It is safe to pass the "id" in the function parameter. How can I prevent a user to change the parameter "id"? It is possible to change it?

 

Best Regards,

[Psycho]

Hi, thanks for the reply.

 

One question. It is safe to pass the "id" in the function parameter. How can I prevent a user to change the parameter "id"? It is possible to change it?

 

How are you going to know what to delete if the ID isn't passed? If you are concerned about malicious users deleting records that shoulnd't be then you shoudll validate on the delete script that the user requesting the delete has the appropriate authorization to do so.

[jcbones]

You could also do it in a link.

 

<a href="url?id=<?php echo $id; ?>" onclick"return confirm('Are you sure you wish to delete?');">Remove</a>

[lopes_andre]

Thanks for all the reply's.

 

I have done it with Javascript, but it is ugly go to another page and then return to the last page.

 

My question. It is very dificult to do this task using ajax?

 

If I don't need to go to another page and then came back, better.

 

Best Regards,

 

[trq]

It is very dificult to do this task using ajax?

 

That completely depends on your ability, but it should be pretty straight forward.

[jcbones]

I'll leave this as a note to the last question:

 

Ajax Tutorial