Backported the patches:

[PATCH] Add placeholder values, update command_hint_txt to match
[PATCH] Handle chrooted sites

Author: ms217

interface/web/sites/cron_edit.php

@@ -78,6 +78,29 @@ function onShowEnd() {
 			$app->tpl->setVar("edit_disabled", 0);
 		}
 
+		$parent_domain = $app->db->queryOneRecord("SELECT `domain_id`, `system_user`, `system_group`, `domain`, `document_root`, `hd_quota`, `php_cli_binary`
+			FROM `web_domain`
+				LEFT JOIN server_php ON web_domain.server_php_id = server_php.server_php_id
+			WHERE `domain_id` = ?", $this->dataRecord["parent_domain_id"]);
+
+		if(!$parent_domain["domain_id"]) {
+			$app->log("Parent domain not found", LOGLEVEL_WARN);
+			return 0;
+		}
+
+		$web_docroot_client = '';
+
+		if($this->dataRecord['type'] != 'chrooted') {
+			$web_docroot_client = $this->parent_domain['document_root'];
+		}
+
+		// web folder is hardcoded to /web:
+		$web_docroot_client .= '/web';
+
+		// Example values for placeholders.
+		$app->tpl->setVar("php_cli_binary", $parent_domain['php_cli_binary']);
+		$app->tpl->setVar("docroot_client", $web_docroot_client);
+		$app->tpl->setVar("domain", $parent_domain['domain']);
 
 		parent::onShowEnd();
 	}

interface/web/sites/lib/lang/en_cron.lng

@@ -19,7 +19,7 @@ $wb['run_wday_error_format'] = 'Invalid format for days of the week.';
 $wb['command_error_format'] = 'Invalid command format. Please note that in case of an url call only http/https is allowed.';
 $wb['unknown_fieldtype_error'] = 'An unknown field type has been used.';
 $wb['server_id_error_empty'] = 'The server ID is empty.';
-$wb['command_hint_txt'] = 'e.g. /var/www/clients/clientX/webY/myscript.sh or https://www.mydomain.com/path/script.php, you can use [web_root] placeholder that is replaced by /var/www/clients/clientX/webY/web.';
+$wb['command_hint_txt'] = 'e.g. /var/www/clients/clientX/webY/myscript.sh or https://www.mydomain.com/path/script.php, you can include the placeholders above that will be replaced with their value. Hover over the variable to see it\'s expected value.';
 $wb['log_output_txt'] = 'Log output';
 $wb['limit_cron_url_txt'] = 'URL cron only. Please enter a URL starting with https:// as cron command.';
 $wb['command_error_empty'] = 'Command is empty.';

interface/web/sites/templates/cron_edit.htm

@@ -51,8 +51,11 @@
                 <label for="command" class="col-sm-3 control-label">{tmpl_var name='command_txt'}</label>
                 <div class="col-sm-9">
 					<input type="text" name="command" id="command" value="{tmpl_var name='command'}" class="form-control" />
-                    <b>{tmpl_var name='variables_txt'}:</b> <a href="javascript:void(0);" data-toggle="tooltip" title="{tmpl_var name='php_cli_binary'}" class="addPlaceholder">{SITE_PHP}</a>, <a href="javascript:void(0);" data-toggle="tooltip" title="{tmpl_var name='docroot_client'}" class="addPlaceholder">{DOCROOT_CLIENT}</a>,  <a href="javascript:void(0);" data-toggle="tooltip" title="{tmpl_var name='domain'}" class="addPlaceholder">{DOMAIN}</a>
-					<!--<br><br><p class="formHint">{tmpl_var name='command_hint_txt'}</p>-->
+                    <b>{tmpl_var name='variables_txt'}:</b>
+                                       <a href="javascript:void(0);" data-toggle="tooltip" title="{tmpl_var name='php_cli_binary'}" class="addPlaceholder">{SITE_PHP}</a>,
+                                       <a href="javascript:void(0);" data-toggle="tooltip" title="{tmpl_var name='docroot_client'}" class="addPlaceholder">{DOCROOT_CLIENT}</a>,
+                                       <a href="javascript:void(0);" data-toggle="tooltip" title="{tmpl_var name='domain'}" class="addPlaceholder">{DOMAIN}</a>
+                                       <br><br><p class="formHint">{tmpl_var name='command_hint_txt'}</p>
 				</div>
             </div>
             <div class="form-group">