Title: Hooks | Page 7 of 49 | Developer.WordPress.org

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# Hooks

 * hook[available_permalink_structure_tags](https://developer.wordpress.org/reference/hooks/available_permalink_structure_tags/)
 * Filters the list of available permalink structure tags on the Permalinks settings
   page.
 * Used by [0 functions](https://developer.wordpress.org/reference/hooks/available_permalink_structure_tags/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/available_permalink_structure_tags/#uses)
   | Source: [wp-admin/options-permalink.php:308](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/options-permalink.php#L308-L308)
 * hook[avatar_defaults](https://developer.wordpress.org/reference/hooks/avatar_defaults/)
 * Filters the default avatars.
 * Used by [0 functions](https://developer.wordpress.org/reference/hooks/avatar_defaults/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/avatar_defaults/#uses)
   | Source: [wp-admin/options-discussion.php:294](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/options-discussion.php#L294-L294)
 * hook[before_delete_post](https://developer.wordpress.org/reference/hooks/before_delete_post/)
 * Fires before a post is deleted, at the start of wp_delete_post().
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/before_delete_post/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/before_delete_post/#uses)
   | Source: [wp-includes/post.php:3825](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post.php#L3825-L3825)
 * hook[before_populate_network](https://developer.wordpress.org/reference/hooks/before_populate_network/)
 * Fires before a network is populated.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/before_populate_network/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/before_populate_network/#uses)
   | Source: [wp-admin/includes/schema.php:1022](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/schema.php#L1022-L1022)
 * hook[before_signup_form](https://developer.wordpress.org/reference/hooks/before_signup_form/)
 * Fires before the site Sign-up form.
 * Used by [0 functions](https://developer.wordpress.org/reference/hooks/before_signup_form/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/before_signup_form/#uses)
   | Source: [wp-signup.php:106](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-signup.php#L106-L106)
 * hook[before_signup_header](https://developer.wordpress.org/reference/hooks/before_signup_header/)
 * Fires before the Site Sign-up page is loaded.
 * Used by [0 functions](https://developer.wordpress.org/reference/hooks/before_signup_header/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/before_signup_header/#uses)
   | Source: [wp-signup.php:57](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-signup.php#L57-L57)
 * hook[before_wp_tiny_mce](https://developer.wordpress.org/reference/hooks/before_wp_tiny_mce/)
 * Fires immediately before the TinyMCE settings are printed.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/before_wp_tiny_mce/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/before_wp_tiny_mce/#uses)
   | Source: [wp-includes/class-wp-editor.php:1620](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-editor.php#L1620-L1620)
 * hook[begin_fetch_post_thumbnail_html](https://developer.wordpress.org/reference/hooks/begin_fetch_post_thumbnail_html/)
 * Fires before fetching the post thumbnail HTML.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/begin_fetch_post_thumbnail_html/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/begin_fetch_post_thumbnail_html/#uses)
   | Source: [wp-includes/post-thumbnail-template.php:200](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post-thumbnail-template.php#L200-L200)
 * hook[big_image_size_threshold](https://developer.wordpress.org/reference/hooks/big_image_size_threshold/)
 * Filters the “BIG image” threshold value.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/big_image_size_threshold/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/big_image_size_threshold/#uses)
   | Source: [wp-admin/includes/image.php:285](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/image.php#L285-L285)
 * hook[block_bindings_source_value](https://developer.wordpress.org/reference/hooks/block_bindings_source_value/)
 * Filters the output of a block bindings source.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_bindings_source_value/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_bindings_source_value/#uses)
   | Source: [wp-includes/class-wp-block-bindings-source.php:98](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-block-bindings-source.php#L98-L98)
 * hook[block_bindings_supported_attributes](https://developer.wordpress.org/reference/hooks/block_bindings_supported_attributes/)
 * Filters the supported block attributes for block bindings.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_bindings_supported_attributes/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_bindings_supported_attributes/#uses)
   | Source: [wp-includes/block-bindings.php:165](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-bindings.php#L165-L169)
 * hook[block_bindings_supported_attributes_{$block_type}](https://developer.wordpress.org/reference/hooks/block_bindings_supported_attributes_block_type/)
 * Filters the supported block attributes for block bindings.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_bindings_supported_attributes_block_type/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_bindings_supported_attributes_block_type/#uses)
   | Source: [wp-includes/block-bindings.php:181](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-bindings.php#L181-L184)
 * hook[block_categories](https://developer.wordpress.org/reference/hooks/block_categories/)
 * Filters the default array of categories for block types.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_categories/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_categories/#uses)
   | Source: [wp-includes/block-editor.php:100](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-editor.php#L100-L100)
 * hook[block_categories_all](https://developer.wordpress.org/reference/hooks/block_categories_all/)
 * Filters the default array of categories for block types.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_categories_all/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_categories_all/#uses)
   | Source: [wp-includes/block-editor.php:86](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-editor.php#L86-L86)
 * hook[block_editor_meta_box_hidden_fields](https://developer.wordpress.org/reference/hooks/block_editor_meta_box_hidden_fields/)
 * Adds hidden input fields to the meta box save form.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_editor_meta_box_hidden_fields/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_meta_box_hidden_fields/#uses)
   | Source: [wp-admin/includes/post.php:2605](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/post.php#L2605-L2605)
 * hook[block_editor_no_javascript_message](https://developer.wordpress.org/reference/hooks/block_editor_no_javascript_message/)
 * Filters the message displayed in the block editor interface when JavaScript is
   not enabled in the browser.
 * Used by [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_no_javascript_message/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_no_javascript_message/#uses)
   | Source: [wp-admin/edit-form-blocks.php:427](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/edit-form-blocks.php#L427-L427)
 * hook[block_editor_preload_paths](https://developer.wordpress.org/reference/hooks/block_editor_preload_paths/)
 * Filters the array of paths that will be preloaded.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_editor_preload_paths/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_preload_paths/#uses)
   | Source: [wp-includes/block-editor.php:707](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-editor.php#L707-L707)
 * hook[block_editor_rest_api_preload_paths](https://developer.wordpress.org/reference/hooks/block_editor_rest_api_preload_paths/)
 * Filters the array of REST API paths that will be used to preloaded common data
   for the block editor.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_editor_rest_api_preload_paths/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_rest_api_preload_paths/#uses)
   | Source: [wp-includes/block-editor.php:691](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-editor.php#L691-L691)
 * hook[block_editor_settings](https://developer.wordpress.org/reference/hooks/block_editor_settings/)
 * Filters the settings to pass to the block editor.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_editor_settings/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_settings/#uses)
   | Source: [wp-includes/block-editor.php:659](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-editor.php#L659-L659)
 * hook[block_editor_settings_all](https://developer.wordpress.org/reference/hooks/block_editor_settings_all/)
 * Filters the settings to pass to the block editor for all editor type.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_editor_settings_all/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_editor_settings_all/#uses)
   | Source: [wp-includes/block-editor.php:645](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/block-editor.php#L645-L645)
 * hook[block_local_requests](https://developer.wordpress.org/reference/hooks/block_local_requests/)
 * Filters whether to block local HTTP API requests.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_local_requests/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_local_requests/#uses)
   | Source: [wp-includes/class-wp-http.php:919](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-http.php#L919-L919)
 * hook[block_parser_class](https://developer.wordpress.org/reference/hooks/block_parser_class/)
 * Filter to allow plugins to replace the server-side block parser.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_parser_class/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_parser_class/#uses)
   | Source: [wp-includes/blocks.php:2482](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/blocks.php#L2482-L2482)
 * hook[block_type_metadata](https://developer.wordpress.org/reference/hooks/block_type_metadata/)
 * Filters the metadata provided for registering a block type.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_type_metadata/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_type_metadata/#uses)
   | Source: [wp-includes/blocks.php:499](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/blocks.php#L499-L499)
 * hook[block_type_metadata_settings](https://developer.wordpress.org/reference/hooks/block_type_metadata_settings/)
 * Filters the settings determined from the block type metadata.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/block_type_metadata_settings/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_type_metadata_settings/#uses)
   | Source: [wp-includes/blocks.php:754](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/blocks.php#L754-L754)
 * hook[block_widgets_no_javascript_message](https://developer.wordpress.org/reference/hooks/block_widgets_no_javascript_message/)
 * Filters the message displayed in the block widget interface when JavaScript is
   not enabled in the browser.
 * Used by [0 functions](https://developer.wordpress.org/reference/hooks/block_widgets_no_javascript_message/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/block_widgets_no_javascript_message/#uses)
   | Source: [wp-admin/widgets-form-blocks.php:127](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/widgets-form-blocks.php#L127-L127)
 * hook[bloginfo](https://developer.wordpress.org/reference/hooks/bloginfo/)
 * Filters the site information returned by get_bloginfo().
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/bloginfo/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/bloginfo/#uses)
   | Source: [wp-includes/general-template.php:948](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/general-template.php#L948-L948)
 * hook[bloginfo_rss](https://developer.wordpress.org/reference/hooks/bloginfo_rss/)
 * Filters the bloginfo for display in RSS feeds.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/bloginfo_rss/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/bloginfo_rss/#uses)
   | Source: [wp-includes/feed.php:67](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L67-L67)
 * hook[bloginfo_url](https://developer.wordpress.org/reference/hooks/bloginfo_url/)
 * Filters the URL returned by get_bloginfo().
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/bloginfo_url/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/bloginfo_url/#uses)
   | Source: [wp-includes/general-template.php:938](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/general-template.php#L938-L938)
 * hook[blog_details](https://developer.wordpress.org/reference/hooks/blog_details/)
 * Filters a blog’s details.
 * Used by [2 functions](https://developer.wordpress.org/reference/hooks/blog_details/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/blog_details/#uses)
   | Source: [wp-includes/ms-blogs.php:270](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L270-L270)
 * hook[blog_option_{$option}](https://developer.wordpress.org/reference/hooks/blog_option_option/)
 * Filters a blog option value.
 * Used by [1 function](https://developer.wordpress.org/reference/hooks/blog_option_option/#used-by)
   | Uses [0 functions](https://developer.wordpress.org/reference/hooks/blog_option_option/#uses)
   | Source: [wp-includes/ms-blogs.php:382](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L382-L382)

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