Creare snippet alla Google

[bonaprogram]

piccola modifica con tanto di controlli:

$str = "keyword web design che ci serve e quindi la dobbiamo evidenziare con bold e ricevere una cosa simile (vedi sotto)";
$keyword = "WEB design" ;

function snippet ( $str , $keyword , $words = 5 )
{
    $left_str = '' ; $right_str = '' ; $output_string = '' ; $ts = array ( ) ; $ikey = array ( ) ;
    
    if ( preg_match ( '/(' . $keyword . ')/i' , $str , $ikeys ) )
    {
        $ts = explode ( $ikeys[1] , $str ) ;
    }
    else
    {
        return 'Keyword non trovata' ;
    }
 
    if ( count ( $ts ) )
    {
        $left_words = array_reverse ( explode ( ' ' , $ts[0] ) ) ;
        $right_words = explode ( ' ' , $ts[1] ) ;
        
        for ( $i = 0 ; $i <= $words ; $i++ )
        {
            $left_str .= isset ( $left_words[$words-$i] ) ? $left_words[$words-$i] . ' ' : '' ;
            $right_str .= isset ( $right_words[$i] ) ? $right_words[$i] . ' ' : '' ;
        }

        $output_string = $left_str . '[b]' . $ikeys[1] . '[/b] ' . $right_str ;

        $output_string = ( strlen ( $left_str ) < strlen ( implode ( ' ' , $left_words ) . ' ' ) ) ? '... ' . $output_string : $output_string ;
        $output_string = ( strlen ( $right_str ) < strlen ( implode ( ' ' , $right_words ) . ' ' ) ) ? $output_string . ' ...' : $output_string ;
 
        return $output_string;
    }
    else
    {
        return 'Keyword non trovata' ;
    }
}

echo 'stringa_completa: ' . $str . '
' ;

echo 'stringa_trattata:' .  snippet ( $str, $keyword, 8 ) ;