Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

admin_bar_preprocess_page in modules/admin_bar/admin_bar.module
Implements hook_preprocess_page().
bartik_preprocess_layout in themes/bartik/template.php
Prepares variables for layout template files.
bartik_preprocess_maintenance_page in themes/bartik/template.php
Prepares variables for maintenance page templates.
basis_preprocess_header in themes/basis/template.php
Prepares variables for header templates.
basis_preprocess_layout in themes/basis/template.php
Prepares variables for layout templates.
basis_preprocess_maintenance_page in themes/basis/template.php
Prepares variables for maintenance page templates.
basis_preprocess_node in themes/basis/template.php
Prepares variables for node templates.
basis_preprocess_page in themes/basis/template.php
Prepares variables for page templates.
book_preprocess_block in modules/book/book.module
Implements hook_preprocess_block().
comment_preprocess_block in modules/comment/comment.module
Implements hook_preprocess_block().
comment_preprocess_node in modules/comment/comment.module
Prepares variables for comment.tpl.php
dashboard_preprocess_block in modules/dashboard/dashboard.module
Implements hook_preprocess_block().
dashboard_preprocess_layout in modules/dashboard/dashboard.module
Implements hook_preprocess_layout().
date_preprocess_views_view in modules/date/date.theme.inc
Implements template_preprocess_views_view().
layout_preprocess_layout in modules/layout/layout.theme.inc
Prepares variables for layout templates.
locale_preprocess_block in modules/locale/locale.module
Implements hook_preprocess_block().
locale_preprocess_node in modules/locale/locale.module
Implements MODULE_preprocess_HOOK().
menu_preprocess_block in modules/menu/menu.module
Implements hook_preprocess_block().
node_row_node_view_preprocess_node in modules/node/views/node.views.inc
Implements hook_preprocess_node().
search_embedded_form_preprocess_search_results in modules/search/tests/search_embedded_form/search_embedded_form.module
Adds the test form to search results.
search_preprocess_block in modules/search/search.module
Implements hook_preprocess_block().
seven_preprocess_layout in themes/seven/template.php
Prepares variables for layout templates.
seven_preprocess_maintenance_page in themes/seven/template.php
seven_preprocess_page in themes/seven/template.php
Implements hook_preprocess_page().
system_preprocess_block in modules/system/system.module
Implements hook_preprocess_block().
system_preprocess_page_components in modules/system/system.theme.inc
Prepares variables for Page Component block templates.
template_preprocess_admin_bar_icon in modules/admin_bar/admin_bar.theme.inc
Preprocesses variables for theme_admin_bar_icon().
template_preprocess_block in modules/layout/layout.theme.inc
Prepares variables for block templates.
template_preprocess_block_dynamic in modules/layout/layout.theme.inc
Prepares variables for block-dynamic templates.
template_preprocess_book_all_books_block in modules/book/book.theme.inc
Processes variables for book-all-books-block.tpl.php.
template_preprocess_book_navigation in modules/book/book.theme.inc
Processes variables for book-navigation.tpl.php.
template_preprocess_ckeditor_settings_toolbar in modules/ckeditor/ckeditor.theme.inc
Preprocess variables for theme_ckeditor_settings_toolbar().
template_preprocess_comment in modules/comment/comment.theme.inc
Preprocesses variables for comment.tpl.php.
template_preprocess_datetime in includes/theme.inc
Preprocess variables for theme_datetime().
template_preprocess_date_views_filter_form in modules/date/date.theme.inc
Preprocessor for Date Views filter form.
template_preprocess_date_views_pager in modules/date/date.theme.inc
Preprocess function for Date pager template.
template_preprocess_field in modules/field/field.theme.inc
Theme preprocess function for theme_field() and field.tpl.php.
template_preprocess_file_entity in modules/file/file.module
Process variables for file.tpl.php
template_preprocess_header in includes/theme.inc
Preprocess variables for header.tpl.php
template_preprocess_image in includes/theme.inc
Preprocess variables for theme_image().
template_preprocess_installer_browser_block in modules/installer/installer.theme.inc
Add some variables for the project browse block theme.
template_preprocess_installer_browser_install in modules/installer/installer.theme.inc
Add some variables for the projects install theme.
template_preprocess_installer_browser_install_queue in modules/installer/installer.theme.inc
Add some variables for the projects install queue theme.
template_preprocess_installer_browser_list in modules/installer/installer.theme.inc
Add some variables for the projects list theme.
template_preprocess_installer_browser_project in modules/installer/installer.theme.inc
Add some variables for the project theme.
template_preprocess_installer_browser_project_dialog in modules/installer/installer.theme.inc
Add some variables for the project details dialog.
template_preprocess_layout__simmons in layouts/simmons/simmons.php
Process variables for the simmons layout.
template_preprocess_layout__three_three_four_column in layouts/legacy/three_three_four_column/three_three_four_column.php
Process variables for the 3/3/4 column layout.
template_preprocess_maintenance_page in includes/theme.inc
Prepares variables for maintenance-page templates.
template_preprocess_menu_tree in includes/menu.inc
Implements template_preprocess_HOOK() for theme_menu_tree().
template_preprocess_node in modules/node/node.theme.inc
Processes variables for node.tpl.php.
template_preprocess_page in includes/theme.inc
Preprocess variables for page.tpl.php
template_preprocess_search_results in modules/search/search.theme.inc
Process variables for search-results.tpl.php.
template_preprocess_taxonomy_term in modules/taxonomy/taxonomy.theme.inc
Process variables for taxonomy-term.tpl.php.
template_preprocess_theme_test in modules/simpletest/tests/theme_test.theme.inc
Preprocesses variables for theme_theme_test().
template_preprocess_username in modules/user/user.theme.inc
Preprocesses variables for theme_username().
template_preprocess_user_picture in modules/user/user.theme.inc
Process variables for user-picture.tpl.php.
template_preprocess_user_profile in modules/user/user.theme.inc
Process variables for user-profile.tpl.php.
template_preprocess_views_exposed_form in modules/views/templates/views.theme.inc
Default theme function for all filter forms.
template_preprocess_views_ui_display_tab_bucket in modules/views_ui/views_ui.theme.inc
template_preprocess_views_ui_display_tab_column in modules/views_ui/views_ui.theme.inc
template_preprocess_views_ui_display_tab_setting in modules/views_ui/views_ui.theme.inc
template_preprocess_views_ui_view_preview_section in modules/views_ui/views_ui.theme.inc
Theme preprocess for theme_views_ui_view_preview_section().
template_preprocess_views_view in modules/views/templates/views.theme.inc
Preprocess the primary theme implementation for a view.
template_preprocess_views_view_field in modules/views/templates/views.theme.inc
Process a single field within a view.
template_preprocess_views_view_fields in modules/views/templates/views.theme.inc
Preprocess theme function to print a single record from a row, with fields
template_preprocess_views_view_grid in modules/views/templates/views.theme.inc
Display a view as a grid style.
template_preprocess_views_view_grouping in modules/views/templates/views.theme.inc
Process a single grouping within a view.
template_preprocess_views_view_list in modules/views/templates/views.theme.inc
Display the view as an HTML list element
template_preprocess_views_view_mapping_test in modules/views/tests/views_test/views_test.module
Implements hook_preprocess_HOOK() for theme_views_view_mapping_test().
template_preprocess_views_view_row_comment in modules/comment/views/comment.views.inc
Template helper for theme_views_view_row_comment
template_preprocess_views_view_row_rss in modules/views/templates/views.theme.inc
Default theme function for all RSS rows.
template_preprocess_views_view_row_search in modules/search/views/search.views.inc
Template helper for theme_views_view_row_search
template_preprocess_views_view_rss in modules/views/templates/views.theme.inc
Preprocess an RSS feed
template_preprocess_views_view_summary in modules/views/templates/views.theme.inc
Preprocess theme function to print a single record from a row, with fields
template_preprocess_views_view_summary_unformatted in modules/views/templates/views.theme.inc
Template preprocess theme function to print summary basically unformatted.
template_preprocess_views_view_table in modules/views/templates/views.theme.inc
Display a view as a table style.
template_preprocess_views_view_unformatted in modules/views/templates/views.theme.inc
Display the simple view of rows one after another
theme_test_preprocess_page in modules/simpletest/tests/theme_test.module
Implements hook_preprocess_page().
user_preprocess_block in modules/user/user.module
Implements hook_preprocess_block().
views_preprocess_comment in modules/views/views.module
A theme preprocess function to automatically allow view-based node templates if called from a view.
views_preprocess_layout in modules/views/views.module
Implements hook_preprocess_layout().
views_preprocess_node in modules/views/views.module
A theme preprocess function to automatically allow view-based node templates if called from a view.
views_ui_preprocess_views_view in modules/views_ui/views_ui.module
Theme preprocess for views-view.tpl.php.