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<?php $exp = '/[\s\S]*\{%[\s\S]*for[\s\S]*ad[\s\S]*in[\s\S]*ads[\s\S]*%\}/'; $string = "{% for ad in ads %} sdfksjf {% for ad in ads %} sdfksjf2 {% for ad in ads %} sdfksjf3"; function str_lreplace($search, $replace, $subject) { return preg_replace('~(.*)' . preg_quote($search, '~') . '~', '$1' . $replace, $subject, 1); } echo str_lreplace($exp,'',$string);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VWpm2
function name:  (null)
number of ops:  9
compiled vars:  !0 = $exp, !1 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%2F%5B%5Cs%5CS%5D%2A%5C%7B%25%5B%5Cs%5CS%5D%2Afor%5B%5Cs%5CS%5D%2Aad%5B%5Cs%5CS%5D%2Ain%5B%5Cs%5CS%5D%2Aads%5B%5Cs%5CS%5D%2A%25%5C%7D%2F'
    3     1        ASSIGN                                                   !1, '%7B%25+for+ad+in+ads+%25%7D+sdfksjf++%7B%25+for+ad+in+ads+%25%7D+sdfksjf2+%7B%25+for+ad+in+ads+%25%7D+sdfksjf3'
    8     2        INIT_FCALL                                               'str_lreplace'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 ''
          5        SEND_VAR                                                 !1
          6        DO_FCALL                                      0  $4      
          7        ECHO                                                     $4
          8      > RETURN                                                   1

Function str_lreplace:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VWpm2
function name:  str_lreplace
number of ops:  18
compiled vars:  !0 = $search, !1 = $replace, !2 = $subject
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        RECV                                             !2      
    6     3        INIT_FCALL                                               'preg_replace'
          4        INIT_FCALL                                               'preg_quote'
          5        SEND_VAR                                                 !0
          6        SEND_VAL                                                 '%7E'
          7        DO_ICALL                                         $3      
          8        CONCAT                                           ~4      '%7E%28.%2A%29', $3
          9        CONCAT                                           ~5      ~4, '%7E'
         10        SEND_VAL                                                 ~5
         11        CONCAT                                           ~6      '%241', !1
         12        SEND_VAL                                                 ~6
         13        SEND_VAR                                                 !2
         14        SEND_VAL                                                 1
         15        DO_ICALL                                         $7      
         16      > RETURN                                                   $7
    7    17*     > RETURN                                                   null

End of function str_lreplace

Generated using Vulcan Logic Dumper, using php 8.0.0


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