PHP If exists form named post_name, not input in form [duplicate]

Question

In PHP you can define input's name just like this: if (isset($_POST['name'])) {}, but my question is how can I define exactly this post (<form method='post' action='action.php'> with this name (name='post_name') exists.

So the whole HTML would be like this:

<form method='post' name='post_name' action='action.php'><input name='name' /></form>

I'm trying to achieve this, because I have more forms on my page and I want to work with exactly this one. I can theoretically change action='', but I want to have it in same file or do this: if (isset($_post_name)) {}, but it doesn't work.

In form name attribute is post_name and in php u checking only name user if (isset($_POST['post_name'])) {} — Null Pointer
– Null Pointer, Commented Apr 19, 2018 at 14:39
$_POST['name'] is a reference to the input (and other) form elements, not teh form itself — xander
– xander, Commented Apr 19, 2018 at 14:40
@xander I know. I wrote it there, but I want to know how to define name of form itself. — SenTisso
– SenTisso, Commented Apr 19, 2018 at 14:42
So to make this clearer, are you trying to identify which form submitted the form element? — Darren Crabb
– Darren Crabb, Commented Apr 19, 2018 at 14:43

mayur pitroda · Accepted Answer · 2018-04-19 15:13:54Z

2

To identify the each submitted form, you can use:

As hidden input field.

Set a name or value of the submit button.

<form name="myform" method="post" action="" enctype="multipart/form-data">
<input type="hidden" name="frmname" value=""/>
</form>

edited Apr 19, 2018 at 15:13

answered Apr 19, 2018 at 14:53

mayur pitroda

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3 Comments

SenTisso Over a year ago

So I can bypass it by creating random input in that form and in PHP I would define if that hidden input exists and if it would, that would mean form exists too.

Noman Over a year ago

how does your answer is different from this ? stackoverflow.com/questions/846020/…

SenTisso Over a year ago

I was "asking" if I get this right, but that's my bad, sorry.

Zübeyr Aydemir · Accepted Answer · 2018-04-19 14:55:03Z

1

You can use the same action file by using a GET parameter. Instead of naming the form element itself you can change the action this way:

<form method='post' action='action.php?formname=form1'>...</form>
<form method='post' action='action.php?formname=form2'>...</form>

Then in php:

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if ($_GET['formname'] == 'form1') {
        //stuff
    } 
    else if($_GET['formname'] == 'form2' {
        //other stuff
    }
}

Or you can simply add an hidden input element to define which form is posted.

answered Apr 19, 2018 at 14:55

Zübeyr Aydemir

514 bronze badges

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