Problem with drupal outputting a username. Using drupal's theme function theme output

Problem with drupal outputting a username. Using drupal's theme function theme output_PHP tutorial

WBOY

Release： 2016-07-14 10:10:13

Original

751 people have browsed it

Today I encountered a problem with drupal outputting a username. The output was using drupal’s theme function theme, so I searched for information and found out the following:

1. theme('username', array('account' => $log)) calls the function, parameter 1 is hook, parameter 2 is parameter

There are too many codes that will not be displayed. To view the address, click to open the link

2. The preprocessing function and processing function that go back to find the template during execution are template_preprocess_username(&$variables) and template_process_username(&$variables) respectively. These two functions are in theme.inc

[php]
/**
* Preprocesses variables for theme_username().
*
* Modules that make any changes to variables like 'name' or 'extra' must insure
* that the final string is safe to include directly in the output by using
* check_plain() or filter_xss().
*
* @see template_process_username()
*/
function template_preprocess_username(&$variables) {
$account = $variables['account'];

$variables['extra'] = '';
if (empty($account->uid)) {
   $variables['uid'] = 0;
   if (theme_get_setting('toggle_comment_user_verification')) {
     $variables['extra'] = ' (' . t('not verified') . ')';
   }
}
else {
    $variables['uid'] = (int) $account->uid;
}

// Set the name to a formatted name that is safe for printing and
// that won't break tables by being too long. Keep an unshortened,
// unsanitized version, in case other preprocess functions want to implement
// their own shortening logic or add markup. If they do so, they must ensure
// that $variables['name'] is safe for printing.
$name = $variables['name_raw'] = format_username($account);
if (drupal_strlen($name) > 20) {
    $name = drupal_substr($name, 0, 15) . '...';
}
$variables['name'] = check_plain($name);

$variables['profile_access'] = user_access('access user profiles');
$variables['link_attributes'] = array();
// Populate link path and attributes if appropriate.
if ($variables['uid'] && $variables['profile_access']) {
    // We are linking to a local user.
    $variables['link_attributes'] = array('title' => t('View user profile.'));
    $variables['link_path'] = 'user/' . $variables['uid'];
}
elseif (!empty($account->homepage)) {
    // Like the 'class' attribute, the 'rel' attribute can hold a
    // space-separated set of values, so initialize it as an array to make it
    // easier for other preprocess functions to append to it.
    $variables['link_attributes'] = array('rel' => array('nofollow'));
    $variables['link_path'] = $account->homepage;
    $variables['homepage'] = $account->homepage;
}
// We do not want the l() function to check_plain() a second time.
$variables['link_options']['html'] = TRUE;
// Set a default class.
$variables['attributes_array'] = array('class' => array('username'));
}

/**
* Processes variables for theme_username().
*
* @see template_preprocess_username()
*/
function template_process_username(&$variables) {
// Finalize the link_options array for passing to the l() function.
// This is done in the process phase so that attributes may be added by
// modules or the theme during the preprocess phase.
if (isset($variables['link_path'])) {
    // $variables['attributes_array'] contains attributes that should be applied
    // regardless of whether a link is being rendered or not.
    // $variables['link_attributes'] contains attributes that should only be
    // applied if a link is being rendered. Preprocess functions are encouraged
    // to use the former unless they want to add attributes on the link only.
    // If a link is being rendered, these need to be merged. Some attributes are
    // themselves arrays, so the merging needs to be recursive.
    $variables['link_options']['attributes'] = array_merge_recursive($variables['link_attributes'], $variables['attributes_array']);
}
}

/**
* Preprocesses variables for theme_username().
*
* Modules that make any changes to variables like 'name' or 'extra' must insure
* that the final string is safe to include directly in the output by using
* check_plain() or filter_xss().
*
* @see template_process_username()
*/
function template_preprocess_username(&$variables) {
$account = $variables['account'];

$variables['extra'] = '';
if (empty($account->uid)) {
   $variables['uid'] = 0;
   if (theme_get_setting('toggle_comment_user_verification')) {
     $variables['extra'] = ' (' . t('not verified') . ')';
   }
}
else {
    $variables['uid'] = (int) $account->uid;
}

// Set the name to a formatted name that is safe for printing and
// that won't break tables by being too long. Keep an unshortened,
// unsanitized version, in case other preprocess functions want to implement
// their own shortening logic or add markup. If they do so, they must ensure
// that $variables['name'] is safe for printing.
$name = $variables['name_raw'] = format_username($account);
if (drupal_strlen($name) > 20) {
$name = drupal_substr($name, 0, 15) . '...';
}
$variables['name'] = check_plain($name);

$variables['profile_access'] = user_access('access user profiles');
$variables['link_attributes'] = array();
// Populate link path and attributes if appropriate.
if ($variables['uid'] && $variables['profile_access']) {
    // We are linking to a local user.
    $variables['link_attributes'] = array('title' => t('View user profile.'));
    $variables['link_path'] = 'user/' . $variables['uid'];
}
elseif (!empty($account->homepage)) {
    // Like the 'class' attribute, the 'rel' attribute can hold a
    // space-separated set of values, so initialize it as an array to make it
    // easier for other preprocess functions to append to it.
    $variables['link_attributes'] = array('rel' => array('nofollow'));
    $variables['link_path'] = $account->homepage;
    $variables['homepage'] = $account->homepage;
}
// We do not want the l() function to check_plain() a second time.
$variables['link_options']['html'] = TRUE;
// Set a default class.
$variables['attributes_array'] = array('class' => array('username'));
}

/**
* Processes variables for theme_username().
*
* @see template_preprocess_username()
*/
function template_process_username(&$variables) {
// Finalize the link_options array for passing to the l() function.
// This is done in the process phase so that attributes may be added by
// modules or the theme during the preprocess phase.
if (isset($variables['link_path'])) {
    // $variables['attributes_array'] contains attributes that should be applied
    // regardless of whether a link is being rendered or not.
    // $variables['link_attributes'] contains attributes that should only be
    // applied if a link is being rendered. Preprocess functions are encouraged
    // to use the former unless they want to add attributes on the link only.
    // If a link is being rendered, these need to be merged. Some attributes are
    // themselves arrays, so the merging needs to be recursive.
    $variables['link_options']['attributes'] = array_merge_recursive($variables['link_attributes'], $variables['attributes_array']);
}
}

3、处理完这些变量后接下来就到了主题函数了，这里实现了最终html的拼装与输出 theme_username($variables);

[php]
function theme_username($variables) {
if (isset($variables['link_path'])) {
    // We have a link path, so we should generate a link using l().
    // Additional classes may be added as array elements like
    // $variables['link_options']['attributes']['class'][] = 'myclass';
    $output = l($variables['name'] . $variables['extra'], $variables['link_path'], $variables['link_options']);
}
else {
    // Modules may have added important attributes so they must be included
    // in the output. Additional classes may be added as array elements like
    // $variables['attributes_array']['class'][] = 'myclass';
    $output = '' . $variables['name'] . $variables['extra'] . '';
}
return $output;
} '>