3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo preg_replace_callback('/\d+/', function (array $m) { return strrev($m[0]); }, 'Hello World 37. What? 24 last 6650');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9nX7Q
function name:  (null)
number of ops:  8
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_replace_callback'
          1        SEND_VAL                                                 '%2F%5Cd%2B%2F'
          2        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2F9nX7Q%3A3%240'
          3        SEND_VAL                                                 ~0
          4        SEND_VAL                                                 'Hello+World+37.+What%3F+24+last+6650'
          5        DO_ICALL                                         $1      
          6        ECHO                                                     $1
          7      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2F9nX7Q%3A3%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9nX7Q
function name:  {closure}
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 function %00%7Bclosure%7D%2Fin%2F9nX7Q%3A3%240

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
155.36 ms | 1386 KiB | 17 Q