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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 |
---|---|
4851 | * Filters a fragment from the pattern passed to wp_sprintf(). |
4852 | * |
4853 | * If the fragment is unchanged, then sprintf() will be run on the fragment. |
4854 | * |
4855 | * @since 2.5.0 |
4856 | * |
4857 | * @param string $fragment A fragment from the pattern. |
4858 | * @param string $arg The argument. |
4859 | */ |
4860 | $_fragment = apply_filters( 'wp_sprintf', $fragment, $arg ); |
4861 | if ( $_fragment != $fragment ) { |
4862 | $fragment = $_fragment; |
4863 | } else { |
4864 | $fragment = sprintf( $fragment, strval( $arg ) ); |
4865 | } |
4866 | } |
4867 |
|
4868 | // Append to result and move to next fragment |
4869 | $result .= $fragment; |