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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
4858 | * This string is substituted for the \s sequence as needed in regular |
4859 | * expressions. For websites not written in English, different characters |
4860 | * may represent whitespace. For websites not encoded in UTF-8, the 0xC2 0xA0 |
4861 | * sequence may not be in use. |
4862 | * |
4863 | * @since 4.0.0 |
4864 | * |
4865 | * @param string $spaces Regexp pattern for matching common whitespace characters. |
4866 | */ |
4867 | $spaces = apply_filters( 'wp_spaces_regexp', '[\r\n\t ]|\xC2\xA0| ' ); |
4868 | } |
4869 |
|
4870 | return $spaces; |
4871 | } |
4872 |
|
4873 | /** |
4874 | * Print the important emoji-related styles. |
4875 | * |
4876 | * @since 4.2.0 |