[WordPress] On Writing Clever Code with Arrays in WordPress

00-clever-code-with-arrays.php

<?php

// Get the excerpt from the incoming post.
$post    = get_post( $post_id );
$excerpt = $post->post_excerpt;

/**
 * And we update the post content without the information (and we don't need
 * paragraph tags).
 */
$event_post->post_excerpt = 
  apply_filters( 
    'the_excerpt', 
    implode( ', ', 
      array_diff( 
        array_map( 
          'trim', 
          explode( ',', $excerpt ) 
        ), 
      array( $name ) ),
    ),
  );

00-verbose-with-arrays.php

<?php

// Get the excerpt from the incoming post.
$post    = get_post( $post_id );
$excerpt = $post->post_excerpt;

// Remove the name from the array of names in the excerpt.
$to_remove = array( $name );
$names     = array_map( 'trim', explode( ',', $excerpt ) );
$result    = array_diff( $names, $to_remove );

// Now creae the new excerpt.
$new_excerpt = implode( ', ', $result );

/**
 * And we update the post content without the information (and we don't need
 * paragraph tags).
 */
$event_post->post_excerpt = apply_filters( 'the_excerpt', $new_excerpt );