Passing a parameter form PHP HTML form - php

Question

I am using WordPress and Gravity Forms plugin and I am trying to pass a parameter from a third party provider to a Gravity Form with Dynamic Population from another page, using the below code
<form method="post" name="goToForm" action="http://www.example.com/?page_id=123">
<input type="hidden" name="param" value="Hello">
<input type="submit" name="fromSubmit" value="Submit">
</form>
Note that the above http://www.example.com/?page_id=123 is the Gravity Form URL.
the closest solution I found is using the HOOK method, but still I want to know how can I call the custom function that is created in functions.php using the HOOK approach from post and pass the parameter.
Any suggestions will be appreciated

Answer 1

If I'm understanding you correctly you want to pass the parameters on the form url?
You can accomplish this in 2 ways:
URL: http://www.example.com/?page_id=123
You can add a hidden field in the form. In the advanced section of the field, select Allow field to be populated dynamically and add the parameter name. So example I want to get the page_id:
After saving your form, inspect the hidden field and you should see it's value as 123
You can add a hook function:
add_filter('gform_field_value_page_id', 'my_custom_population_function');
function my_custom_population_function($value){
return $value'; //or do what ever you want with it
}
If you want to add the page title or id automatically to the form:
Add a hidden field, in the advanced section of the field, add this {embed_post:ID} (Post ID) to the default value. OR
Add a hidden field, in the advanced section of the field, add this {embed_post:post_title} (Post Title) to the default value.
Edit
The user is looking for http://www.gravityhelp.com/documentation/page/Gform_after_submission
You can get your fields/parameters from your form and then save it to your database, update a Wordpress page/post or send it to a third party service provider.
I'm not too sure what user would like to do with the parameter, so I'll show an example of sending it to a third party provider:
We want our entry field numbers so we can get the correct fields:
/* Getting correct field numbers */
add_action("gform_after_submission", "post_to_third_party", 10, 2);
function post_to_third_party($entry, $form){
// Lets get the IDs of the relevant fields and prepare an email message
$message = print_r($entry, true);
// In case any of our lines are larger than 70 characters, we should use wordwrap()
$message = wordwrap($message, 70);
// Send
mail('you#domain.com', 'Getting the Gravity Form Field IDs', $message);
}
You should get something like this in your mail:
Array
(
[id] => 64
[form_id] => 5
[date_created] => 2014-07-02 13:27:00
[is_starred] => 0
[is_read] => 0
[ip] => ::1
[source_url] => http://localhost/
[post_id] =>
[currency] => USD
[payment_status] =>
[payment_date] =>
[transaction_id] =>
[payment_amount] =>
[payment_method] =>
[is_fulfilled] =>
[created_by] => 1
[transaction_type] =>
[user_agent] => Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153
Safari/537.36
[status] => active
[1] => Name
[4] => Parameter
)
Where [1] => Name is a Name field and I entered Name for testing and [4] => Parameter is the parameter field with a default value of Parameter.
After we have our correct field numbers, we can then submit it to the third party provider, I'm using curl in this example:
/* Submitting to thirdparty.com */
add_action("gform_after_submission", "post_to_third_party", 10, 2);
function post_to_third_party($entry, $form){
//Submitting to thirdparty.com using curl
function post_to_url($url, $data) {
$fields = '';
foreach($data as $key => $value) {
$fields .= $key . '=' . $value . '&';
}
rtrim($fields, '&');
$post = curl_init();
curl_setopt($post, CURLOPT_URL, $url);
curl_setopt($post, CURLOPT_POST, count($data));
curl_setopt($post, CURLOPT_POSTFIELDS, $fields);
curl_setopt($post, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($post, CURLOPT_HEADER, 1); //if you want headers
curl_setopt($post, CURLOPT_HEADER, "Content-Type:application/xml");
$result = curl_exec($post);
//If there's an error
if($result === false)
{
echo "Error Number:".curl_errno($ch)."<br>";
echo "Error String:".curl_error($ch);
}
curl_close($post);
}
if($form["id"] == 1){//Form ID
//Lets get the fields to match submission to thirdparty.com
$data = array(
"FirstName" => $entry["1"],
"ParameterName" => $entry["4"]
);
post_to_url("http://thirdparty.com", $data);
}
}
If you want the hook to work for a specific form gform_after_submission_1 will work for form id 1 only.