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<?php $string = 'whatever text including some $text between delimiters$ and...'; $string_replaced = preg_replace_callback('/\$[^$]*\$/', function($m) { return preg_replace('~\s+~u', ':', $m[0]); }, $string); echo $string_replaced;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5nsp8
function name:  (null)
number of ops:  10
compiled vars:  !0 = $string, !1 = $string_replaced
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'whatever+text+including+some+%24text+between+delimiters%24+and...'
    4     1        INIT_FCALL                                                   'preg_replace_callback'
          2        SEND_VAL                                                     '%2F%5C%24%5B%5E%24%5D%2A%5C%24%2F'
          3        DECLARE_LAMBDA_FUNCTION                              ~3      [0]
    6     4        SEND_VAL                                                     ~3
          5        SEND_VAR                                                     !0
    4     6        DO_ICALL                                             $4      
          7        ASSIGN                                                       !1, $4
    7     8        ECHO                                                         !1
    8     9      > 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/5nsp8
function name:  {closure:/in/5nsp8:4}
number of ops:  6
compiled vars:  !0 = $m
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    4     0  E >   RECV                                                 !0      
    5     1        FETCH_DIM_R                                          ~1      !0, 0
          2        FRAMELESS_ICALL_3                preg_replace        ~2      '%7E%5Cs%2B%7Eu', '%3A'
          3        OP_DATA                                                      ~1
          4      > RETURN                                                       ~2
    6     5*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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