Php，如何摆脱$ this？ （而不是破坏当前对象）

I want to pass informations to a template:

public function do(array $p)
{
    extract($p);
    unset($p);
    ob_start();
    require('view.php');
    return ob_get_clean();
}

$object->do([
    'a' => 1
]);

view.php

<?php
var_dump(get_declared_vars());

this way the dump will output a => 1 and the $this object, but I dont want to see $this. How to nullify it?

From the manual

The pseudo-variable $this is available when a method is called from within an object context. $this is a reference to the calling object (usually the object to which the method belongs, but possibly another object, if the method is called statically from the context of a secondary object).

This variable is added automatically and it's very useful when trying to access the classes variables from it's method.

<?php
class SimpleClass
{
    // property declaration
    public $var = 'a default value';

    // method declaration
    public function displayVar() {
        echo $this->var;
    }
}
?>

Why this is bothering you, I don't know, but you can remove this by using:

$declared_vars = get_declared_vars();
unset($declared_vars["this"]);
var_dump($declared_vars);

(This is not tested because my php version doesn't have the get_declared_vars() function, but if it returns an array, this is the path and may need only a few changes.

I tried this...

<?php
class forJohn {

    public function test (array $p) {
        extract($p);
        unset( $p );
        ob_start();
        require( 'view.php' );
        return ob_get_clean();
    }
}

$object = new forJohn;
echo $object->test( ['a' => 1] );

View.php

<?php
var_dump(get_defined_vars());

Interestingly, this results in

array (size=1)
  'a' => int 1

Now I have had to use get_defined_vars() as I don't have access to your get_declared_vars(). Might be that is the answer!