[Plugin: User Switching] Template tag show switch back link

OK… I implemented a shortcode to insert a switchback link.

You can call it from PHP like this, with or without a custom message:

<?php echo do_shortcode( "[switch_back_link]" ) ?>
<?php echo do_shortcode( "[switch_back_link]WARNING: Don't use the logout button![/switch_back_link]" ) ?>

To do this, I added this line in __construct():

add_shortcode('switch_back_link', array($this,'switch_back_link_shortcode'));

I initially wrote switch_back_link_shortcode() as a call to admin_notice() wrapped in ob_start() … ob_end_clean(), but I couldn’t get it to work. The script quietly aborted in or around admin_notice(). Probably something a more experienced PHP programmer would figure out, but it stumped me. So I just copied the guts of admin_notice() into my function. Not elegant, but gets me what I need.

function switch_back_link_shortcode ($atts, $content = null) {
		global $user_identity, $user_login;

		ob_start();

		if ( $old_user = $this->get_old_user() ) {
			?>
			<div id="user_switching" class="updated">
				<p><?php
					if ( isset( $_GET['user_switched'] ) )
						printf( __( 'Switched to %1$s (%2$s).', 'user_switching' ), $user_identity, $user_login );
						printf( ' <a href="%s">%s</a>.%s', $this->switch_back_url(),
							sprintf( __( 'Switch back to %1$s (%2$s)', 'user_switching' ),
							$old_user->display_name, $old_user->user_login ),
							(!is_null($content) ? " <span>$content</span>" : "" )
						);
				?></p>
			</div>
			<?php

		} else if ( isset( $_GET['user_switched'] ) ) {

			?>
			<div id="user_switching" class="updated">
				<p><?php
					if ( isset( $_GET['switched_back'] ) )
						printf( __( 'Switched back to %1$s (%2$s).', 'user_switching' ), $user_identity, $user_login );
					else
						printf( __( 'Switched to %1$s (%2$s).', 'user_switching' ), $user_identity, $user_login );
				?></p>
			</div>
			<?php

		}

		$sb_link = ob_get_contents();

		ob_end_clean();

		return $sb_link;

	}

I’ve not tested this extensively, but it does work in header.php while switched and not.

John – Feel free to use or adapt this in any way you would like in your module. I’d rather abandon my branch if you do.

-dave

I needed to switch to one user account easily for every admin user.
I searched how to display a “switch to” link in admin notice and i found.

I don’t know if someone need this but i share my code, insert to line 225 juste after

<div id="user_switching" class="updated">
				<p><?php
					if ( isset( $_GET['switched_back'] ) )
						printf( __( 'Switched back to %1$s (%2$s).', 'user_switching' ), $user_identity, $user_login );
					else
						printf( __( 'Switched to %1$s (%2$s).', 'user_switching' ), $user_identity, $user_login );
				?></p>
			</div>
			<?php

		}

i added this lines

else {
		//switch to timothee <a href="' . $this->switch_to_url( $user->ID ) . '">'. _e( 'Switch To', 'user_switching' ).'</a>
		?>
		<div id="user_switching" class="updated">
				<p><?php

				if ( current_user_can( 'switch_to_user', 1 ) )
					printf( '<a href="' . $this->switch_to_url( 1 ) . '">' . __( 'Switch To', 'user_switching' ) . ': Timothée</a>');
				?></p>
			</div>
		<?//end of switch to timothee
		}

The number 1 is the ID account of the user i want to switch. It appear two times you have to change it if needed.
The username of this account is Timothée so i wrote Timothée you have to change it too, or simply erase it.

I think the code is without security problem can someone confirm that ?
I’m sorry for my English, especially if there are mistakes.