Remove last character in get_post_meta

This is more of a PHP question then a WordPress question.

If you want to remove punctuation marks like (.,-;:) you can try this recursive version:

$s = get_post_meta( $post->ID, 'one_line_summary', TRUE );

if( function_exists( 'remove_punctuation_marks' ) )
    $s = remove_punctuation_marks( $s );

with

/**
 * Remove punctuation marks (.,-;:) if they're the last characters in the string
 * WPSE: 119519
 *
 * @param string $s
 * @return string $s
 */
function remove_punctuation_marks( $s )
{
    $remove = array( '.', ',', '-', ';', ':' );          // Edit this to your needs 
    if( in_array( mb_substr( $s, -1 ), $remove, TRUE ) )
        $s = remove_punctuation_marks( mb_substr( $s, 0, -1 ) ); 

    return $s;    
}

where you can define $remove to your needs and mb_substr() is a multi-byte version of substr().

Example:

The following test:

echo  remove_punctuation_marks( '...Hello world...:,;' );

gives the output:

...Hello world

Update:

It’s better to use rtrim() as @toscho pointed out 😉

Then in your case:

$s = get_post_meta( $post->ID, 'one_line_summary', TRUE ); 
$s = rtrim( $s, '.,;:' );

where you can add to the list (.,;:) of punctuation marks to remove.

Example:

Update:

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