Change the default excerpt length in WordPress

This is another useful snippet for modifying the length of the excerpt (in amount of words).

Drop this in your theme’s functions.php and modify the length as you wish:

/*  Excerpt length
/* ------------------------------------ */
function alx_excerpt_length( $length ) {
	return 30;
}
add_filter( 'excerpt_length', 'alx_excerpt_length', 999 );

In this case I set the amount of words to 30.