3v4l.org

run code in 300+ PHP versions simultaneously
<?php $re = '/\h*\R(\h+)[*]useless[*]Text\s*/'; $str = '1 *useless*Text Steve Waugh'; $subst = '$1'; $result = preg_replace($re, $subst, $str, 1); echo $result;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CdWa8
function name:  (null)
number of ops:  12
compiled vars:  !0 = $re, !1 = $str, !2 = $subst, !3 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%2F%5Ch%2A%5CR%28%5Ch%2B%29%5B%2A%5Duseless%5B%2A%5DText%5Cs%2A%2F'
    4     1        ASSIGN                                                   !1, '1%0A++++%2Auseless%2AText%0A++++++++++++++++++++++++++++++++++++Steve+Waugh'
    7     2        ASSIGN                                                   !2, '%241'
    9     3        INIT_FCALL                                               'preg_replace'
          4        SEND_VAR                                                 !0
          5        SEND_VAR                                                 !2
          6        SEND_VAR                                                 !1
          7        SEND_VAL                                                 1
          8        DO_ICALL                                         $7      
          9        ASSIGN                                                   !3, $7
   11    10        ECHO                                                     !3
   12    11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
137.18 ms | 996 KiB | 14 Q