3v4l.org

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<?php $text = 'some text [person name="Jackson" family="Smith"] text [vehicle brand="Benz" type="SUV" doors="4" seats="7"] and [invalid closed="false" monkeywrench [lonetag] text [single gender="female"]'; foreach (preg_match_all('~\[(\w+)(?=(?: \w+="\w+")*])(]?)|(?:\G(?!^) (\w+)="(\w+)")~', $text, $out, PREG_SET_ORDER) ? $out : [] as $matches) { if ($matches[2]) { $result[$matches[1]] = []; } elseif (!isset($matches[3])) { $tag = $matches[1]; } else { $result[$tag][$matches[3]] = $matches[4]; } } var_export($result);
Output for 7.1.25 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 'person' => array ( 'name' => 'Jackson', 'family' => 'Smith', ), 'vehicle' => array ( 'brand' => 'Benz', 'type' => 'SUV', 'doors' => '4', 'seats' => '7', ), 'lonetag' => array ( ), 'single' => array ( 'gender' => 'female', ), )

preferences:
156.52 ms | 408 KiB | 5 Q