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<?php // Everything you enter here will be executed by our servers. Try it! $dirnameCss = 'amoi'; $content = "url(../../toto.jpg);"; $content = preg_replace('`url\(("|\')?(?!(\'|"|)http)(?!(\'|"|)data)([^/])`', 'url(\\1' . $dirnameCss . '/\\4', $content); echo $content;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ldLZJ
function name:  (null)
number of ops:  12
compiled vars:  !0 = $dirnameCss, !1 = $content
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   QM_ASSIGN                                                !0
   5     1        QM_ASSIGN                                                !1
   6     2        INIT_FCALL                                               'preg_replace'
         3        SEND_VAL                                                 '%60url%5C%28%28%22%7C%27%29%3F%28%3F%21%28%27%7C%22%7C%29http%29%28%3F%21%28%27%7C%22%7C%29data%29%28%5B%5E%2F%5D%29%60'
   7     4        CONCAT                                           ~4      'url%28%5C1', !0
         5        CONCAT                                           ~5      ~4, '%2F%5C4'
         6        SEND_VAL                                                 ~5
         7        SEND_VAR                                                 !1
         8        DO_ICALL                                         $6      
         9        QM_ASSIGN                                                !1
   8    10        ASSIGN_OBJ                                               !1
        11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.4.0