Symfony form, what is search input, where does it come from?

Question

symfony

Greetings comrades. Please tell me, I create a form, and when rendering the form, some kind of incomprehensible input appears:

<input id="search" class="form-control" name="search" required="required" type="search">

<form name="search" method="post">
<input id="search" class="form-control" name="search" required="required" type="search">
<div class="form-group">
<div class="form-group">
<div class="form-group">
<div class="form-group">
<div class="form-group">
<input id="search__token" name="search[_token]" value="n5rHEL4lyVBtXid1qjHh_LTk5jrsvrg3-NQLe6GkHHo" type="hidden">
</form>

What kind of input is this? Where does it come from? I'm not asking him to appear ... Senks in advance

Answer 1

Approximately I began to understand, the form is called search and apparently the input climbs automatically, I rename the form and the input disappears

Answer 2

Initially, there is nothing in the form. Either you added this field yourself, or you inherited your Type from the type who adds this role.