There are a few functions that have the ability to return false instead of a string, so the return value should be checked before being passed to functions that expect string.

These are trivial, but they clear out some Scrutinizer issues.

See #30799.


git-svn-id: https://develop.svn.wordpress.org/trunk@31681 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/plugins.php

@@ -321,7 +321,10 @@ if ( $action ) {
 					<?php wp_nonce_field('bulk-plugins') ?>
 					<?php submit_button( $data_to_delete ? __( 'Yes, Delete these files and data' ) : __( 'Yes, Delete these files' ), 'button', 'submit', false ); ?>
 				</form>
-				<form method="post" action="<?php echo esc_url(wp_get_referer()); ?>" style="display:inline;">
+				<?php
+				$referer = wp_get_referer();
+				?>
+				<form method="post" action="<?php echo $referer ? esc_url( $referer ) : ''; ?>" style="display:inline;">
 					<?php submit_button( __( 'No, Return me to the plugin list' ), 'button', 'submit', false ); ?>
 				</form>