WordPressの投稿をJSONで吐き出す。

gistfile1.php

Class WP_JSON_API {

  public function __construct() {
		add_action( "init", array( &$this, "add_query_var" ),10);
		add_action( "init", array( &$this, "json_actions" ),11);

	}

	public function add_query_var() {
		global $wp;
		$wp->add_query_var( "json" );
	}

	public function json_actions() {
		if( $_GET["json"] == "true") {
			add_action( "pre_get_posts", array(&$this, "pre_get_posts"));
			add_action( "wp", array(&$this, "json_format"));
		}
	}

	public function pre_get_posts( $query ) {
		$query->set( "nopaging" ,1 );
	}

	public function json_format( $wp ) {
		global $posts;
		header( 'Content-Type: application/json' );
		echo json_encode( $posts );
		exit;
	}


}

$jsonapi = new WP_JSON_API;