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问题:
I am trying to add a piece of code at the begining of every page in a Drupal site.
Since I have more than one page template, I want to do this programatically... but am not succeeding.
I am still new and, though I get the gist of hooks, theme functions, and the such, I just can't figure the correct way to achieve this.
So far I've overriden the theme_preprocess_page(&$vars) to add the necessary css and js:
function mytheme_preprocess_page(&$vars) {
if(condition) {
drupal_add_js(drupal_get_path('module', 'mymodule').'/js/modal.js');
}
}
How can I now add html code in every drupal page, preferably just after the opening bodytag or in any other starting section, via a function in the template.phpfile?
Thank you
回答1:
In your preprocess function, any variable set, will be available in your page.tpl.php file.
function mytheme_preprocess_page(&$vars) {
if (condition) {
$vars['foo'] = '<div id="bar">TEST</div>';
}
}
then, in your page templates:
<body>
<?php print !empty($foo) ? $foo : ''; ?>
...
回答2:
This should keep you from having to modify any code in your templates:
function MY_MODULE_page_build(&$page)
{
$page['page_bottom']['my-markup'] = array('#markup' => '<div>My Markup Here</div>');
}
回答3:
Had a look at https://www.drupal.org/project/google_tag. This is how they did it:
/**
* Implements hook_page_alter().
*
* Adds a post_render callback
*/
function MYMODULE_page_alter(&$page) {
$page['#post_render'][] = 'MYMODULE_CALLBACK';
}
/**
* Implements callback_post_render().
*
* Inserts JavaScript snippet immediately following the opening body tag.
*/
function MYMODULE_CALLBACK(&$children, $elements) {
$script = '<script type="text/javascript">console.log(\'hello world\');</script>';
// Insert snippet after the opening body tag.
$children = preg_replace('@<body[^>]*>@', '$0' . $script, $children, 1);
return $children;
}
回答4:
My approach finally was overriding the first rendered block in the page, in my case the Language Switcher.
Since I already was overriding it to customize it, it wasn't too much of a big deal, but it is anyway an ugly way to achieve that.
<?php
function mytheme_languageswitcher($links) {
// inserting this here like a virus in a dna strip
if(condition) {
drupal_add_js(drupal_get_path('module', 'mymodule').'/js/modal.js');
}
// the *real* code for the language switcher override
}
?>
Since the Language Switcher is rendered in every page, it works. The day the language switcher stops being displayed for whatever reason, this solution will FAIL.
回答5:
You can add it to the footer with an option passed into the drupal_add_js function.
function THEMENAME_preprocess_page(&$variables) {
if (condition) {
drupal_add_js(drupal_get_path('theme', 'THEMENAME') . '/PATH/TO/FILE.js', array('scope' => 'footer'));
}
}
This will end up printing just before the closing body tag via the $page_bottom variable in the template html.tpl.php.
回答6:
Another way to do it is to use the native drupal methods drupal_add_js and drupal_get_js.
// first, add your JS with a custom "scope" (before process phase)
<?php
drupal_add_js($tag_js, array(
'type' => 'inline',
'group' => JS_GROUP_TAGS,
'every_page' => TRUE,
'scope' => 'body_start',
'weight' => 1,
));
?>
// ugly way : add the drupal_get_js directly into html.tpl.php (but for testing, it's useful):
<body>
<?php print drupal_get_js('body_start'); ?>
...
</body>
// A cleaner way : use an intermediate variable, in a process method
// Exactly like template_process_html, in theme.inc
<?php
function MYMODULEORTHEME_process_html(&$variables){
$variables['js_body_start'] .= drupal_get_js('body_start');
}
?>
Enjoy :)
