With target RETURN is matched, the target specified by the chain If theĮnd of a built-in chain is reached or a rule in a built-in chain Resume at the next rule in the previous (calling) chain. RETURN means stop traversing this chain and One of the special values ACCEPT, DROP or RETURN.ĪCCEPT means to let the packet through. The value of the target, which can be the name of a user-definedĬhain, one of the targets described in iptables-extensions(8), or The packet does not match, the next rule in the chain isĮxamined if it does match, then the next rule is specified by Is called a `target', which may be a jump to a user-defined chainĪ firewall rule specifies criteria for a packet and a target. Each tableĬontains a number of built-in chains and may also contain user-Įach chain is a list of rules which can match a set of packets.Įach rule specifies what to do with a packet that matches. The tables of IPv4 and IPv6 packet filter rules in the Linux Target = -j targetname ĭESCRIPTION top Iptables and ip6tables are used to set up, maintain, and inspect Iptables -P chain target iptables -E old-chain-name new-chain-name Iptables/ip6tables - administration tool for IPv4/IPv6 packet Print the content exactly as intended into the template.IPTABLES(8) iptables 1.8.8 IPTABLES(8) NAME top You may need to unset the things you render into variables from the whole element (in this case form) before rendering the rest. Preprocess everything into separate variables, and pass those into the template. Go to the content type creation page to add a new content type.', => url('admin/structure/types/add'))) In the preprocess function: $variables = t('You have not created any content types yet. Calling these functions in the Twig template rather than the preprocess function can cut down on function calls since variables passed to the template might not get printed in the template at all. To provide raw data to templates for as long as possible, theme developers should call filters such as t and utility functions such as url() from within Twig templates. While render arrays provide an addressable, alterable structure for data all the way through to the template, not all variables require render arrays. $row = drupal_render($display) Ĭall filters and utility functions in templates Before, unnecessary call to drupal_render(). $variables = drupal_render($node_teaser) Ĭommon is that drupal_render() was called when adding to table data. Removing drupal_render() from a preprocess function is just a matter of removing the call: // Before, unnecessary call to drupal_render(). After - passing a render array to the template. Removing theme() call from a preprocess function: // Before - passing a string of rendered HTML to the template. Instead, render arrays should be passed to the template since this allows for much more customization than an already-rendered HTML string. Twig renders everything automatically so there is no need to call drupal_render() or theme() within a preprocess function. Return render arrays from preprocess functionsĪlways return render arrays instead of calling theme() or drupal_render() within preprocess functions. The "before" examples here are generally in the style of Drupal 7 code.įor additional options for rendering via twig consider the twig_tweak contributed module. This guide is written to assist Drupal developers who may have Drupal 7 experience and are trying to remove functions like theme() or drupal_render() which should no longer be used in Drupal 8+. Call filters and utility functions in templates.Return render arrays from preprocess functions.In order to make Drupal 8 theming as performant as possible and allow for more customization in Twig templates, please follow these best practices:
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