Php – How to detect which submit button was pressed on a Zend Framework form

form-submitPHPzend-form

I have a Zend Framework form that has two submit buttons

$changes = new Zend_Form_Element_Submit('save_changes');
$changes->setLabel('Save Changes');

$delete = new Zend_Form_Element_Submit('delete');
$delete->setLabel('Delete');

Which renders HTML like such:

<input type="submit" name="save_changes" id="user_save_changes" value="Save Changes" >
<input type="submit" name="delete" id="user_delete" value="Delete" >

In the controller, how do I determine which button the user pressed?

Best Answer

In your case you should just be able to check

if(isset($_POST['save_changes'])
// or
if(isset($_POST['delete'])

Since only the value of the clicked button will be submitted.

Usually you give both buttons the same name (e.g. action) and then set the value to the action you want to perform. Unfortunately that doesn't work very well with IE. Check this page for more information about different solutions for multiple submit buttons.

Related Solutions

C# – How to handle multiple submit buttons in ASP.NET MVC Framework

Here is a mostly clean attribute-based solution to the multiple submit button issue based heavily on the post and comments from Maarten Balliauw.

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class MultipleButtonAttribute : ActionNameSelectorAttribute
{
    public string Name { get; set; }
    public string Argument { get; set; }

    public override bool IsValidName(ControllerContext controllerContext, string actionName, MethodInfo methodInfo)
    {
        var isValidName = false;
        var keyValue = string.Format("{0}:{1}", Name, Argument);
        var value = controllerContext.Controller.ValueProvider.GetValue(keyValue);

        if (value != null)
        {
            controllerContext.Controller.ControllerContext.RouteData.Values[Name] = Argument;
            isValidName = true;
        }

        return isValidName;
    }
}

razor:

<form action="" method="post">
 <input type="submit" value="Save" name="action:Save" />
 <input type="submit" value="Cancel" name="action:Cancel" />
</form>

and controller:

[HttpPost]
[MultipleButton(Name = "action", Argument = "Save")]
public ActionResult Save(MessageModel mm) { ... }

[HttpPost]
[MultipleButton(Name = "action", Argument = "Cancel")]
public ActionResult Cancel(MessageModel mm) { ... }

Update: Razor pages looks to provide the same functionality out of the box. For new development, it may be preferable.

Php – How to PHP determine if the user pressed the Enter key or Submit button

You can identify which button was used provided you structure your HTML correctly

<input type="submit" name="action" value="Edit">
<input type="submit" name="action" value="Preview">
<input type="submit" name="action" value="Post">

The $_POST array (or $_GET/$_REQUEST) will contain the key "action" with the value of the enacted button (whether clicked or not).

Now, "clicking" is explicitly a client-side behavior - if you want to differentiate between a click and a keypress, you'll need to add some scripting to your form to aid in that determination.

Edit

Alternatively, you can be "sneaky" and use a hidden submit that should correctly identify a key-pressed for submission, but this probably has some significant impact on accessibility.

<?php

if ( 'POST' == $_SERVER['REQUEST_METHOD'] )
{
    echo '<pre>';
    print_r( $_POST );
    echo '</pre>';
}

?>
<form method="post">

    <input type="text" name="test" value="Hello World">

    <input type="submit" name="action" value="None" style="display: none">
    <input type="submit" name="action" value="Edit">
    <input type="submit" name="action" value="Preview">
    <input type="submit" name="action" value="Post">

</form>

Best Answer

Related Solutions

C# – How to handle multiple submit buttons in ASP.NET MVC Framework

Php – How to PHP determine if the user pressed the Enter key or Submit button

Edit

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