/**
* Custom excerpt length.
*
* @link http://stackoverflow.com/a/17177847
*
* @param int $limit The number of words.
*/
function excerpt( $limit ) {
return wp_trim_words( get_the_excerpt(), $limit );
}
echo excerpt( '15' );
or if you want read more,
function custom_read_more() {
return '... <a class="read-more" href="' . get_permalink( get_the_ID() ) . '">more »</a>';
}
function excerpt( $limit ) {
return wp_trim_words( get_the_excerpt(), $limit, custom_read_more() );
}