晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : /home/stando/www/wp-content/plugins/w3-total-cache/Base_Page_Settings.php
<?php
namespace W3TC;



class Base_Page_Settings {
	/**
	 * Config
	 *
	 * @var Config
	 */
	protected $_config = null;

	/**
	 * Notes
	 *
	 * @var array
	 */
	protected $_notes = array();

	/**
	 * Errors
	 *
	 * @var array
	 */
	protected $_errors = array();

	/**
	 * Used in PHPMailer init function
	 *
	 * @var string
	 */
	protected $_phpmailer_sender = '';

	/**
	 * Master configuration
	 *
	 * @var Config
	 */
	protected $_config_master;

	protected $_page;

	function __construct() {
		$this->_config = Dispatcher::config();
		$this->_config_master = Dispatcher::config_master();

		$this->_page = Util_Admin::get_current_page();
	}

	function options() {
		$this->view();
	}

	public function render_footer() {
		include W3TC_INC_OPTIONS_DIR . '/common/footer.php';
	}

	/**
	 * Returns true if config section is sealed
	 *
	 * @param string  $section
	 * @return boolean
	 */
	protected function is_sealed( $section ) {
		return true;
	}

	/**
	 * Returns true if we edit master config
	 *
	 * @return boolean
	 */
	protected function is_master() {
		return $this->_config->is_master();
	}

	/**
	 * Prints checkbox with config option value
	 *
	 * @param string  $option_id
	 * @param bool    $disabled
	 * @param string  $class_prefix
	 * @param bool    $label
	 */
	protected function checkbox( $option_id, $disabled = false,
		$class_prefix = '', $label = true, $force_value = null ) {
		$disabled = $disabled || $this->_config->is_sealed( $option_id );
		$name = Util_Ui::config_key_to_http_name( $option_id );

		if ( !$disabled )
			echo '<input type="hidden" name="' . $name . '" value="0" />';

		if ( $label )
			echo '<label>';
		echo '<input class="'.$class_prefix.'enabled" type="checkbox" id="' . $name .
			'" name="' . $name . '" value="1" ';
		if ( !is_null( $force_value ) )
			checked( $force_value, true );
		else
			checked( $this->_config->get_boolean( $option_id ), true );

		if ( $disabled )
			echo 'disabled="disabled" ';

		echo ' />';
	}

	/**
	 * Prints a radio button and if config value matches value
	 *
	 * @param string  $option_id    config id
	 * @param unknown $value
	 * @param bool    $disabled
	 * @param string  $class_prefix
	 */
	protected function radio( $option_id, $value, $disabled = false, $class_prefix = '' ) {
		if ( is_bool( $value ) )
			$rValue = $value?'1':'0';
		else
			$rValue = $value;
		$disabled = $disabled || $this->_config->is_sealed( $option_id );

		$name = Util_Ui::config_key_to_http_name( $option_id );

		echo '<label>';
		echo '<input class="'.$class_prefix.'enabled" type="radio" id="' . $name .
			'" name="' . $name . '" value="', $rValue, '" ';
		checked( $this->_config->get_boolean( $option_id ), $value );

		if ( $disabled )
			echo 'disabled="disabled" ';

		echo ' />';
	}

	/**
	 * Prints checkbox for debug option
	 *
	 * @param string  $option_id
	 */
	protected function checkbox_debug( $option_id ) {
		if ( is_array( $option_id ) ) {
			$section = $option_id[0];
			$section_enabled = $this->_config->is_extension_active_frontend( $section );
		} else {
			$section = substr( $option_id, 0, strrpos( $option_id, '.' ) );
			$section_enabled = $this->_config->get_boolean( $section . '.enabled' );
		}

		$disabled = $this->_config->is_sealed( $option_id ) || !$section_enabled;
		$name = Util_Ui::config_key_to_http_name( $option_id );

		if ( !$disabled )
			echo '<input type="hidden" name="' . $name . '" value="0" />';

		echo '<label>';
		echo '<input class="enabled" type="checkbox" id="' . $name .
			'" name="' . $name . '" value="1" ';
		checked( $this->_config->get_boolean( $option_id ) && $section_enabled, true );

		if ( $disabled )
			echo 'disabled="disabled" ';

		echo ' />';
	}

	protected function checkbox_debug_pro( $option_id, $label, $label_pro ) {
		if ( is_array( $option_id ) ) {
			$section = $option_id[0];
			$section_enabled = $this->_config->is_extension_active_frontend( $section );
		} else {
			$section = substr( $option_id, 0, strrpos( $option_id, '.' ) );
			$section_enabled = $this->_config->get_boolean( $section . '.enabled' );
		}

		$is_pro = Util_Environment::is_w3tc_pro( $this->_config );
		$disabled = $this->_config->is_sealed( $option_id ) || !$section_enabled ||
			!$is_pro;
		$name = Util_Ui::config_key_to_http_name( $option_id );

		if ( !$disabled )
			echo '<input type="hidden" name="' . $name . '" value="0" />';

		echo '<label>';
		echo '<input class="enabled" type="checkbox" id="' . $name .
			'" name="' . $name . '" value="1" ';
		checked( $this->_config->get_boolean( $option_id ) && $is_pro, true );

		if ( $disabled )
			echo 'disabled="disabled" ';

		echo ' />';
		echo esc_html( $label );
		if ( $is_pro ) {
			echo $label_pro;
		}
		echo '</label>';
	}

	protected function value_with_disabled( $option_id, $disabled,
		$value_when_disabled ) {
		if ( $disabled ) {
			echo 'value="' . esc_attr( $value_when_disabled ) . '" ';
			echo 'disabled="disabled" ';
		} else {
			echo 'value="' .
				esc_attr( $this->_config->get_string( $option_id ) ) . '" ';
		}
	}

	protected function view() {
		include W3TC_INC_DIR . '/options/common/header.php';
	}
}

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