joelworsham/how-to-dynamically-hide-a-widget.php

## how-to-dynamically-hide-a-widget.php
<?php

// Don't change anything on this line EXCEPT for "hide_widget_pages". You can change that if you want, but you don't
// have to. But if you do, be sure to change it...
add_filter( 'widget_display_callback', 'hide_widget_pages', 10, 3 );

// ... here as well! And don't worry about changing anything else in this line.
function hide_widget_pages( $instance, $widget, $args ) {

	// This is where you would enter the widget ID that you want to hide. Get this by using the Chrome inspector
	// to find the "id" attribute that the widget exists in (though don't use the dash and number, like "widget-3"
	// would be "widget".
	if ( $widget->id_base == 'pages' ) {

		// This is where you change what page you want to have the widget display on. You can use the page title,
		// the slug (url), or the ID.
		// If you remove the exclamation mark, it will do the opposite, meaning it will NOT show on this specific
		// page.
		if ( ! is_page( 'Contact' ) ) {
			return false;
		}
	}
}
	<?php

	// Don't change anything on this line EXCEPT for "hide_widget_pages". You can change that if you want, but you don't
	// have to. But if you do, be sure to change it...
	add_filter( 'widget_display_callback', 'hide_widget_pages', 10, 3 );

	// ... here as well! And don't worry about changing anything else in this line.
	function hide_widget_pages( $instance, $widget, $args ) {

	// This is where you would enter the widget ID that you want to hide. Get this by using the Chrome inspector
	// to find the "id" attribute that the widget exists in (though don't use the dash and number, like "widget-3"
	// would be "widget".
	if ( $widget->id_base == 'pages' ) {

	// This is where you change what page you want to have the widget display on. You can use the page title,
	// the slug (url), or the ID.
	// If you remove the exclamation mark, it will do the opposite, meaning it will NOT show on this specific
	// page.
	if ( ! is_page( 'Contact' ) ) {
	return false;
	}
	}
	}