如何在php类中定义或不定义子项

Question

I get a POST data by this code.

$form->handleRequest($request);

if ($form->isValid()) {

Then I want to get a data.

$form->get('send')->isChecked();

If there is a 'send' submit button, it works well,however there is not it show this error.

Child "send" does not exist.

Then I have struggled to see if 'send' data is included $form or not.

like this

if ($form->get('send') !== null){

However it shows the same error.

How can I tell there is 'send' submit button in $form ??

---

There is 'send' button or 'draft' button depending on the situation.

I would like to tell which button is exist.

if ($form->get('send')->isChecked()){
} 
else if( $form->get('draft')->isChecked()){
}

but ,this code shows the error when access the button which is not exist.

Answer 1

I've never used Symphony and, after looking at their terrible documentation, I probably will never. Based on looking at the source code, the $form object should have a has($name) method. So try

if ($form->has('send')){