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<?php $value = 'a, moder php framework.= is a must 1234'; $output = preg_replace('/^[a-zA-z\d]/', '_', $value); echo $output;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/GXa5n
function name:  (null)
number of ops:  9
compiled vars:  !0 = $value, !1 = $output
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                                   !0, 'a%2C+moder++php+framework.%3D+is+a+must+1234'
    5     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%5E%5Ba-zA-z%5Cd%5D%2F'
          3        SEND_VAL                                                 '_'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $3      
          6        ASSIGN                                                   !1, $3
    7     7        ECHO                                                     !1
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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