Parse error: syntax error, unexpected '['
- на строку $grouped = [];Fatal error: Cannot use assign-op operators with overloaded objects nor string offsets
- на строку $grouped[$key]['item'] += $r['item']; {"type":"Feature","id":12,"geometry":{"type":"Polygon","coordinates":"[[[39.711474857055116,43.5914206561279],[39.713963947020936,43.58262375085823],[39.72769685717719,43.57189102130725],[39.748124561034615,43.57638402624879],[39.73379083605902,43.59684788797694],[39.711474857055116,43.5914206561279]]]"}}