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// Hook the get_the_excerpt filter hook, run the function named mfp_Add_Text_To_Excerpt
add_filter("get_the_excerpt", "mfp_Add_Text_To_Excerpt");
// If today is a Thursday, remove the filter from the_excerpt()
if (date("l") === "Thursday") {
remove_filter("get_the_excerpt", "mfp_Add_Text_To_Excerpt");
// Take the excerpt, add some text before it, and return the new excerpt
function mfp_Add_Text_To_Excerpt($old_Excerpt)
$new_Excerpt = "<b>Excerpt: </b>" . $old_Excerpt;
return $new_Excerpt;
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