3v4l.org

run code in 500+ PHP versions simultaneously
<?php $re = '/\b\d{4}\s—.*?(?=\s+\d{4}\s—|$)/su'; $str = '1977 — пожар в московской гостинице «Россия», в результате которого погибло 42 человека 1992 — создано Российское космическое агентство 1994 — Барух Гольдштейн совершил теракт в пещере Патриархов'; preg_match_all($re, $str, $matches); print_r($matches[0]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/AAHuZ
function name:  (null)
number of ops:  12
compiled vars:  !0 = $re, !1 = $str, !2 = $matches
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, '%2F%5Cb%5Cd%7B4%7D%5Cs%E2%80%94.%2A%3F%28%3F%3D%5Cs%2B%5Cd%7B4%7D%5Cs%E2%80%94%7C%24%29%2Fsu'
    4     1        ASSIGN                                                       !1, '1977+%E2%80%94+%D0%BF%D0%BE%D0%B6%D0%B0%D1%80+%D0%B2+%D0%BC%D0%BE%D1%81%D0%BA%D0%BE%D0%B2%D1%81%D0%BA%D0%BE%D0%B9+%D0%B3%D0%BE%D1%81%D1%82%D0%B8%D0%BD%D0%B8%D1%86%D0%B5+%C2%AB%D0%A0%D0%BE%D1%81%D1%81%D0%B8%D1%8F%C2%BB%2C+%D0%B2+%D1%80%D0%B5%D0%B7%D1%83%D0%BB%D1%8C%D1%82%D0%B0%D1%82%D0%B5+%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D0%BE%D0%B3%D0%BE+%D0%BF%D0%BE%D0%B3%D0%B8%D0%B1%D0%BB%D0%BE+42+%D1%87%D0%B5%D0%BB%D0%BE%D0%B2%D0%B5%D0%BA%D0%B0+1992+%E2%80%94+%D1%81%D0%BE%D0%B7%D0%B4%D0%B0%D0%BD%D0%BE+%D0%A0%D0%BE%D1%81%D1%81%D0%B8%D0%B9%D1%81%D0%BA%D0%BE%D0%B5+%D0%BA%D0%BE%D1%81%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%B5+%D0%B0%D0%B3%D0%B5%D0%BD%D1%82%D1%81%D1%82%D0%B2%D0%BE+1994+%E2%80%94+%D0%91%D0%B0%D1%80%D1%83%D1%85+%D0%93%D0%BE%D0%BB%D1%8C%D0%B4%D1%88%D1%82%D0%B5%D0%B9%D0%BD+%D1%81%D0%BE%D0%B2%D0%B5%D1%80%D1%88%D0%B8%D0%BB+%D1%82%D0%B5%D1%80%D0%B0%D0%BA%D1%82+%D0%B2+%D0%BF%D0%B5%D1%89%D0%B5%D1%80%D0%B5+%D0%9F%D0%B0%D1%82%D1%80%D0%B8%D0%B0%D1%80%D1%85%D0%BE%D0%B2'
    5     2        INIT_FCALL                                                   'preg_match_all'
          3        SEND_VAR                                                     !0
          4        SEND_VAR                                                     !1
          5        SEND_REF                                                     !2
          6        DO_ICALL                                                     
    6     7        INIT_FCALL                                                   'print_r'
          8        FETCH_DIM_R                                          ~6      !2, 0
          9        SEND_VAL                                                     ~6
         10        DO_ICALL                                                     
         11      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
153.2 ms | 1494 KiB | 10 Q