gistfile1.txt

// theme code

$contestants = apply_filters('contestants', 'name');


if ( is_array( $contestants ) ) {
	foreach($contestants as $contestant){
		echo "hello " . $contestant . '<br>';
	}
} elseif ( is_string($contestants)){
	echo 'hello ' . $contestant . '<br>';
}



// if I add filter like this:

add_filter( 'contestants', function(){
	return array('Tom','Dick','Harry');
});

// it will return :
//  hello Tom
//  hello Dick
//  hello Harry



// if I add filter like this:

add_filter( 'contestants', function(){
	return 'Chris';
});

// it will return :
//  hello Chris