3v4l.org

run code in 500+ PHP versions simultaneously
<?php $name = 'ab1 ab2'; echo preg_replace_callback('/[a-z]+/i', fn($m) => strrev($m[0]), $name);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fCI9O
function name:  (null)
number of ops:  9
compiled vars:  !0 = $name
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'ab1+ab2'
    5     1        INIT_FCALL                                                   'preg_replace_callback'
          2        SEND_VAL                                                     '%2F%5Ba-z%5D%2B%2Fi'
          3        DECLARE_LAMBDA_FUNCTION                              ~2      [0]
          4        SEND_VAL                                                     ~2
          5        SEND_VAR                                                     !0
          6        DO_ICALL                                             $3      
          7        ECHO                                                         $3
          8      > RETURN                                                       1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/fCI9O
function name:  {closure:/in/fCI9O:5}
number of ops:  7
compiled vars:  !0 = $m
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
          0  E >   RECV                                                 !0      
          1        INIT_FCALL                                                   'strrev'
          2        FETCH_DIM_R                                          ~1      !0, 0
          3        SEND_VAL                                                     ~1
          4        DO_ICALL                                             $2      
          5      > RETURN                                                       $2
          6*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
169.11 ms | 1968 KiB | 15 Q