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What do you use ESC _ URL for in WordPress?
Used for: Output being used in the context of an HTML attribute (think “title”, “data-” fields, “alt” text). What it does: The exact same thing as esc_html. The only difference is that different WordPress filters are applied to each function.
When to use ESC _ url when sanitizing URLs?
Always use esc_url when sanitizing URLs (in text nodes, attribute nodes or anywhere else). Rejects URLs that do not have one of the provided whitelisted protocols (defaulting to http, https, ftp, ftps, mailto, news, irc, gopher, nntp, feed, and telnet), eliminates invalid characters and removes dangerous characters.
Which is the escaping function in WordPress.com?
Output escaping should occur as late as possible. Rather than using echo to output data, it’s common to use the WordPress localization functions, such as _e () or __ (). These functions simply wrap a localization function inside an escaping function: These helper functions combine localization and escaping:
When to use ESC _ ATTR ( E, alt )?
Always use when escaping HTML attributes (especially form values) such as alt, value, title, etc. To escape the value of a translation use esc_attr__ () instead; to escape, translate and echo, use esc_attr_e (). Introduced.
When to return an empty string in ESC url?
Use esc_url_raw () for database usage. (string) The cleaned URL after the ‘clean_url’ filter is applied. An empty string is returned if $url specifies a protocol other than those in $protocols, or if $url contains an empty string.
(string) The processed string. wp_strip_all_tags () is added to the following filters by default (see wp-includes/default-filters.php ): It is also applied to these filters by default when on the administration side of the site: