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<?php $str = 'asdfnsdfasdjkl <span class="number_box">1.</span> asdfkjsadfasd'; printf (preg_replace('/<span class="number_box">(\d).<\/span>/', '<span class="number_box">$1</span>', $str));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5ItZH
function name:  (null)
number of ops:  10
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'asdfnsdfasdjkl+%3Cspan+class%3D%22number_box%22%3E1.%3C%2Fspan%3E+asdfkjsadfasd'
    5     1        INIT_FCALL                                               'printf'
          2        INIT_FCALL                                               'preg_replace'
          3        SEND_VAL                                                 '%2F%3Cspan+class%3D%22number_box%22%3E%28%5Cd%29.%3C%5C%2Fspan%3E%2F'
          4        SEND_VAL                                                 '%3Cspan+class%3D%22number_box%22%3E%241%3C%2Fspan%3E'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $2      
          7        SEND_VAR                                                 $2
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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