Drupal - 搜索框不起作用 - 自定义主题模板

Question

我正在使用 search-theme-form.tpl 的自定义版本 当我使用搜索框时，我确实会转到搜索页面。但搜索实际上并没有发生。不过，搜索结果页面上的搜索框确实有效。这是我的 search-them-form.tpl.php 文件（演示：

<input type="text" name="search_theme_form_keys" id="edit-search-theme-form-keys" value="Search" title="Enter the terms you wish to search for" class="logininput" height="24px" onblur="restoreSearch(this)" onfocus="clearInput(this)" />
  <input type="submit" name="op" id="edit-submit" value="" class="form-submit" style="display: none;" />
  <input type="hidden" name="form_token" id="edit-search-theme-form-form-token" value="<?php print drupal_get_token('search_theme_form'); ?>" />
  <input type="hidden" name="form_id" id="edit-search-theme-form" value="search_theme_form" />

还有我想从代码中可以清楚地看出它的用途：

 function trim(str) {  
     return str.replace(/^\s+|\s+$/g, '');  
 }  

 function clearInput(e) {  

        e.value="";                // clear default text when clicked  
    e.className="longininput_onfocus"; //change class

 }  

 function restoreSearch(e) {  
    if (trim(e.value) == '') {  
        {
   e.value="Search";             // reset default text onBlur 
         e.className="logininput";        //reset class
  } 
    }  
 }

问题是什么以及如何解决它？

Answer 1

显然，您不能直接修改 search-theme-form.tpl.php 中的 HTML，因为这不是正确的方法。所以我添加类以及 onFocus 和 onBlur 属性就是问题所在。

正确的方法是修改主题 template.php 文件。基本上我们将使用 form_alter() 来修改表单元素。由于使用HTML方式是错误的。看一下下面的代码（取自：此处）

<?php
/**
* Override or insert PHPTemplate variables into the search_theme_form template.
*
* @param $vars
*   A sequential array of variables to pass to the theme template.
* @param $hook
*   The name of the theme function being called (not used in this case.)
*/
function yourthemename_preprocess_search_theme_form(&$vars, $hook) {
  // Note that in order to theme a search block you should rename this function
  // to yourthemename_preprocess_search_block_form and use
  // 'search_block_form' instead of 'search_theme_form' in the customizations
  // bellow.

  // Modify elements of the search form
  $vars['form']['search_theme_form']['#title'] = t('');

  // Set a default value for the search box
  $vars['form']['search_theme_form']['#value'] = t('Search this Site');

  // Add a custom class and placeholder text to the search box
  $vars['form']['search_theme_form']['#attributes'] = array('class' => 'NormalTextBox txtSearch', 
                                                              'onfocus' => "if (this.value == 'Search this Site') {this.value = '';}",
                                                              'onblur' => "if (this.value == '') {this.value = 'Search this Site';}");

  // Change the text on the submit button
  //$vars['form']['submit']['#value'] = t('Go');

  // Rebuild the rendered version (search form only, rest remains unchanged)
  unset($vars['form']['search_theme_form']['#printed']);
  $vars['search']['search_theme_form'] = drupal_render($vars['form']['search_theme_form']);

  $vars['form']['submit']['#type'] = 'image_button';
  $vars['form']['submit']['#src'] = path_to_theme() . '/images/search.jpg';

  // Rebuild the rendered version (submit button, rest remains unchanged)
  unset($vars['form']['submit']['#printed']);
  $vars['search']['submit'] = drupal_render($vars['form']['submit']);

  // Collect all form elements to make it easier to print the whole form.
  $vars['search_form'] = implode($vars['search']);
}
?>

在 yourthemename_preprocess_search_theme_form 中 - “yourthemename”显然会反映您的自定义主题的名称。基本上代码是不言自明的。评论什么的。

所以，基本上这就是它的工作方式。