3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_replace('#(\d{3})(\d{3})(\d{4})#', '$1-$2-$3', '0123456789'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZfPKN
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%23%28%5Cd%7B3%7D%29%28%5Cd%7B3%7D%29%28%5Cd%7B4%7D%29%23'
          3        SEND_VAL                                                 '%241-%242-%243'
          4        SEND_VAL                                                 '0123456789'
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
136.7 ms | 999 KiB | 15 Q