_jetpack_og_get_image_validate_size() – Validate the width and height against required width and height
Comments::only_allow_white_listed_comment_types() – Prevents any comment types that are not in the whitelist from being enqueued and sent to WordPress.com.
csstidy_optimise::AnalyseCssNumber() – Checks if a given string is a CSS valid number. If it is, an array containing the value and unit is returned
csstidy_optimise::cut_color() – Color compression function. Converts all rgb() values to #-values and uses the short-form if possible. Also replaces 4 color names by #-values.
csstidy_optimise::discard_invalid_selectors() – Removes invalid selectors and their corresponding rule-sets as defined by 4.1.7 in REC-CSS2. This is a very rudimentary check and should be replaced by a full-blown parsing algorithm or regular expression
csstidy_optimise::dissolve_4value_shorthands() – Dissolves properties like padding:10px 10px 10px to padding-top:10px;padding-bottom:10px;.
csstidy_optimise::explode_ws() – Explodes a string as explode() does, however, not if $sep is escaped or within a string.
csstidy_optimise::merge_4value_shorthands() – Merges Shorthand properties again, the opposite of dissolve_4value_shorthands()
csstidy_optimise::merge_selectors() – Merges selectors with same properties. Example: a{color:red} b{color:red} -> a,b{color:red} Very basic and has at least one bug. Hopefully there is a replacement soon.
csstidy_optimise::shorthand() – Compresses shorthand values. Example: margin:1px 1px 1px 1px -> margin:1px
Defaults::get_options_contentless() – Filter the list of WordPress options that are manageable via the JSON API.
Filter_Embedded_HTML_Objects::maybe_create_links() – Failed embeds are stripped, so let’s convert them to links at least.
Filter_Embedded_HTML_Objects::regexp_entities() – Replace HTML entities in current HTML element regexp.
Filter_Embedded_HTML_Objects::register() – Register a filter to convert a matching HTML element to a shortcode.
Filter_Embedded_HTML_Objects::sh_regexp_callback() – Capture tokens found in Syntax Highlighter and collect them in self::$sh_unfiltered_content_tokens.
Filter_Embedded_HTML_Objects::unregister() – Delete an existing registered pattern/replacement filter.
Functions::get_raw_or_filtered_url() – Helper function that is used when getting home or siteurl values. Decides whether to get the raw or filtered value.
grunion_add_bulk_edit_option() – Hack a ‘Bulk Spam’ option for bulk edit in other than spam view Hack a ‘Bulk Delete’ option for bulk edit in spam view
Jetpack_Calypsoify::get_calypso_origin() – Returns the Calypso domain that originated the current request.
Jetpack_CLI::count_option() – Return the number of times an option appears Normally an option would only appear 1 since the option key is supposed to be unique but if a site hasn’t updated the DB schema then that would not be the case.
jetpack_conditionally_activate_cron_on_plugin_activation() – Executed when Jetpack gets activated. Tries to activate the cron if it is needed.
jetpack_content_options_customize_preview_js() – Binds JS handlers to make Theme Customizer preview reload changes asynchronously.
Jetpack_Cxn_Test_Base::output_fails_as_wp_error() – Provide single WP Error instance of all failures.
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