function get_k2extra($extra,$idextra){
$field = substr($extra,strpos($extra,"{\"id\":\"".$idextra."\",\"value\":\""));
$field = substr($field,19,strpos($field,"}")-20);
return $field;
}
$temp_extra = $row->extra_fields;
echo get_k2extra( $row->extra_fields , 2 ); oppure echo get_k2_extra( $temp_extra , 2 );
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