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<?php $str = 'http://asas.pl/asdasd//asdads//asd.pdf'; $regexp = '/(?:[^\/\/])(\/\/)/$'; echo preg_replace($regexp, '/', $str);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TXPmI
function name:  (null)
number of ops:  9
compiled vars:  !0 = $str, !1 = $regexp
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'http%3A%2F%2Fasas.pl%2Fasdasd%2F%2Fasdads%2F%2Fasd.pdf'
    4     1        ASSIGN                                                   !1, '%2F%28%3F%3A%5B%5E%5C%2F%5C%2F%5D%29%28%5C%2F%5C%2F%29%2F%24'
    5     2        INIT_FCALL                                               'preg_replace'
          3        SEND_VAR                                                 !1
          4        SEND_VAL                                                 '%2F'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $4      
          7        ECHO                                                     $4
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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