CODEWITHSUNDEEP
phpjavascripthtmlformssubmit
Alaa Gamal
Alaa Gamal

Reputation: 1125

How to know which button has clicked?

i have html form

i am using <a href="#" onclick="document.aa.submit()"> instead of submit button

my code will explain my problem better..

<html>
<form name="aa" action="aa.php" method="post">
<input type="checkbox" name="posts[]" value="1">
<input type="checkbox" name="posts[]" value="2">
<a href="#" onclick="document.aa.submit()">Delete</a>
<a href="#" onclick="document.aa.submit()">Move</a>
</form>
</html>

aa.php

<?php
print_r($_POST);
?>

results

Array ( [posts] => Array ( [0] => 1 [1] => 2 ) )

Now the question is:

How to know user clicked on delete or move?

Note:

i know if i used <input submit> it will fixes the problem

but i can't use submit button for some reason

Note 2

the question is how to detect it by php.

Example:

    Array ( [posts] => Array ( [0] => 1 [1] => 2 ['submit'=>'delete']) ) 

if('delete'){
mysql_query("delete from...")
}
else{
mysql_query("update/move ....");
}

Upvotes: 1

Views: 276

Answers (5)

Alaa Gamal
Alaa Gamal

Reputation: 1125

SOLUTION:

<script>
function createInput(action){
var input = document.createElement("input");
input.setAttribute("type", "hidden");
input.setAttribute("name", "action");
input.setAttribute("value", action);
document.getElementById("forsm").appendChild(input);
document.aa.submit();
}
</script>

<html>
<form name="aa" id="forsm" action="aa.php" method="post">
<input type="checkbox" name="posts[]" value="1">
<input type="checkbox" name="posts[]" value="2">
<a href="#" id="delete" onclick="createInput('delete');">Delete</a>
<a href="#" id="move" onclick="createInput('move');">Move</a>
</form>
</html>

results

Array ( [posts] => Array ( [0] => 2 ) [action] => move )

Many Thanks for Rusty Weber, That gived me the idea

Upvotes: 0

Nick Maroulis
Nick Maroulis

Reputation: 487

You need to make some tweaks to the form so the Post value knows which option you are submitting

  <form name="aa" action="aa.php" id='aa' method="post">
<input type="checkbox" name="posts[]" value="1">
<input type="checkbox" name="posts[]" value="2">
    <a href="#" onclick="submit_function(this)" rel="delete">Delete</a>
        <a href="#" onclick="submit_function(this)" rel="move">Move</a>
        <input id="submit_type" type="hidden" name="task">
        </form>

in js with jquery

function submit_function( item ){
    if( item.rel == 'move')
    {
    document.getElementById('submit_type').value ='move'
    }
    else if( item.rel == 'delete')
    {
    document.getElementById('submit_type').value ='delete'
    }

    document.getElementById('aa').submit()

    }

in php

 if( $_POST['task'] == 'move' )
{
//do move stuff
}

    if( $_POST['task'] == 'delete' )
{
//do delete stuff
}

Upvotes: 0

codefactor
codefactor

Reputation: 1646

Here you go:

<html>
<form name="aa" action="aa.php" method="post">
<input type="hidden" name="action" value="">
<input type="checkbox" name="posts[]" value="1">
<input type="checkbox" name="posts[]" value="2">
<a href="#" onclick="document.aa.action='delete';document.aa.submit()">Delete</a>
<a href="#" onclick="document.aa.action='move';document.aa.submit()">Move</a>
</form>
</html>

Upvotes: 1

astro boy
astro boy

Reputation: 1430

With jQuery you can even get rid of the onclick event in your tags and just add the following jQuery.

$(document).ready(function() {
    $("a").click(function(event) {
        alert($(this).html()) // Replace this line with the one below for your code
        // document.aa.submit($(this).html())   
    });
});​

The $(this).html() will return the innerhtml of the click a tag. e.g "Delete or "Move". You can then use this in your php to identify the clicked linke

Upvotes: 0

Rusty Weber
Rusty Weber

Reputation: 1582

Only PHP?... No javascript? If you are using javascript I would suggest the idea of using a button that calls some javascript to submit the form instead of a link, it might give you better results as you could also make some calls to set some hidden fields of the form before it is submitted. Also, why is submit broken?

Take a look at the following page for know how on how to use hidden fields.

http://www.tizag.com/htmlT/htmlhidden.php

upon post you should be able to get the hidden field as if the user had submitted it and then do your computation in the php instead of the html.

Upvotes: 1

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