Don't die() if there's a problem deleting files. wp_mail() instead. (#…

…551)

* Don't die() if there's a problem deleting files. wp_mail() instead.

* Add the language domain to these translations

* Added filter "wpsc_send_uninstall_errors" to disable sending errors

Return 0 and uninstall errors won't send an email to the admin

wp-cache.php

@@ -3601,16 +3601,16 @@ function wp_cache_disable_plugin( $delete_config_file = true ) {
 			$file_not_deleted[] = 'wp-cache-config.php';
 	}
 	if ( $file_not_deleted ) {
-		$msg = "<p>One or more files could not be deleted. These files and directories must be made writeable:</p>\n <ol><li>" . WP_CONTENT_DIR . "</li>\n";
-		$code = "<ul>\n";
+		$msg = __( "Dear User,\n\nWP Super Cache was removed from your blog or deactivated but some files could\nnot be deleted.\n\n", 'wp-super-cache' );
 		foreach( (array)$file_not_deleted as $filename ) {
-			$msg .= "<li>" . WP_CONTENT_DIR . "/{$filename}</li>";
-			$code .= "<li><code>chmod 666 " . WP_CONTENT_DIR . "/{$filename}</code></li>\n";
+			$msg .=  WP_CONTENT_DIR . "/{$filename}\n";
 		}
-		$code .= "</ul>\n";
+		$msg .= "\n";
+		$msg .= sprintf( __( "You should delete these files manually.\nYou may need to change the permissions of the files or parent directory.\nYou can read more about this in the Codex at\n%s\n\nThank you.", 'wp-super-cache' ), 'https://codex.wordpress.org/Changing_File_Permissions#About_Chmod' );
 
-		$msg .= "</ol>\n<p>First try fixing the directory permissions with this command and refresh this page:<br /><br /><code>chmod 777 " . WP_CONTENT_DIR . "</code><br /><br />If you still see this error, you have to fix the permissions on the files themselves and refresh this page again:</p> {$code}\n<p>Don't forget to fix things later:<br /><code>chmod 755 " . WP_CONTENT_DIR . "</code></p><p>If you don't know what <strong>chmod</strong> is read all about it <a href='https://codex.wordpress.org/Changing_File_Permissions#About_Chmod'>here</a> and note the warning about using 777 permission.</p><p>Please refresh this page when the permissions have been modified.</p>";
-		wp_die( $msg );
+		if ( apply_filters( 'wpsc_send_uninstall_errors', 1 ) ) {
+			wp_mail( get_option( 'admin_email' ), __( 'WP Super Cache: could not delete files', 'wp-super-cache' ), $msg );
+		}
 	}
 	extract( wpsc_get_htaccess_info() ); // $document_root, $apache_root, $home_path, $home_root, $home_root_lc, $inst_root, $wprules, $scrules, $condition_rules, $rules, $gziprules
 	if ( $scrules != '' && insert_with_markers( $home_path.'.htaccess', 'WPSuperCache', array() ) ) {