lib/Twig/lib/Twig/Template.php
public function getBlockNames(array $context = null, array $blocks = array())
    {
        if (null === $context) {
            @trigger_error('The '.__METHOD__.' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.', E_USER_DEPRECATED);

            return array_keys($this->blocks);
        }

        $names = array_merge(array_keys($blocks), array_keys($this->blocks));

        if (false !== $parent = $this->getParent($context)) {
            $names = array_merge($names, $parent->getBlockNames($context));
        }

        return array_unique($names);
    }
public function getBlockNames(array $context = null, array $blocks = array())
    {
        if (null === $context) {
            @trigger_error('The '.__METHOD__.' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.', E_USER_DEPRECATED);

            return array_keys($this->blocks);
        }

        $names = array_merge(array_keys($blocks), array_keys($this->blocks));

        if (false !== $parent = $this->getParent($context)) {
            $names = array_merge($names, $parent->getBlockNames($context));
        }

        return array_unique($names);
    }
public function getBlockNames ( array $ context = null , array $ blocks = array ( ) ) { if ( null === $ context ) { @ trigger_error ( 'The ' . __METHOD__ . ' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.' , E_USER_DEPRECATED ) ; return array_keys ( $ this -> blocks ) ; } $ names = array_merge ( array_keys ( $ blocks ) , array_keys ( $ this -> blocks ) ) ; if ( false !== $ parent = $ this -> getParent ( $ context ) ) { $ names = array_merge ( $ names , $ parent -> getBlockNames ( $ context ) ) ; } return array_unique ( $ names ) ; }
Returns all block names in the current context of the template.

This method checks blocks defined in the current template
or defined in "used" traits or defined in parent templates.

@param array $context The context
@param array $blocks  The current set of blocks

@return array An array of block names

@internal
Returns all block names in the current context of the template .