How to return only named groups with preg_match or preg_match_all?

Question

Example:

$string = \"This is some text written on 2010-07-18.\";
preg_match(\'|(?\\d\\d\\d\\d-\\d\\d-\\d\\d)|i\', $string, $arr_result);
print_r(         


        

Answer 1

I use some of introduced codes and this is the final code works on php 5.6+:

$re = '/\d+\r\n(?[\d\0:]+),\d+\s--\>\s(?[\d\0:]+),.*\r\nHOME.*\r\nGPS\((?[\d\.]+),(?[\d\.]+),(?[\d\.]+)\)\sBAROMETER\:(?[\d\.]+)/';

$str= file_get_contents($srtFile);
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
echo '
';
$filtered=array_map(function ($d){
     return $array_filtered = array_filter($d, "is_string", ARRAY_FILTER_USE_KEY);
    },$matches);
var_dump($filtered);


if you are interested what it does it read position data from a str file that DJI drones generate while recording video.