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<?php var_dump(preg_match('~^(hello\#world)\z~', 'hello#world')); var_dump(preg_match('~^(hello\#world)\z~x', 'hello#world')); var_dump(preg_match('~^(hello#world)\z~', 'hello#world')); var_dump(preg_match('~^(hello#world)\z~x', 'hello#world'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/f1eg0
function name:  (null)
number of ops:  29
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%7E%5E%28hello%5C%23world%29%5Cz%7E'
          3        SEND_VAL                                                 'hello%23world'
          4        DO_ICALL                                         $0      
          5        SEND_VAR                                                 $0
          6        DO_ICALL                                                 
    4     7        INIT_FCALL                                               'var_dump'
          8        INIT_FCALL                                               'preg_match'
          9        SEND_VAL                                                 '%7E%5E%28hello%5C%23world%29%5Cz%7Ex'
         10        SEND_VAL                                                 'hello%23world'
         11        DO_ICALL                                         $2      
         12        SEND_VAR                                                 $2
         13        DO_ICALL                                                 
    6    14        INIT_FCALL                                               'var_dump'
         15        INIT_FCALL                                               'preg_match'
         16        SEND_VAL                                                 '%7E%5E%28hello%23world%29%5Cz%7E'
         17        SEND_VAL                                                 'hello%23world'
         18        DO_ICALL                                         $4      
         19        SEND_VAR                                                 $4
         20        DO_ICALL                                                 
    7    21        INIT_FCALL                                               'var_dump'
         22        INIT_FCALL                                               'preg_match'
         23        SEND_VAL                                                 '%7E%5E%28hello%23world%29%5Cz%7Ex'
         24        SEND_VAL                                                 'hello%23world'
         25        DO_ICALL                                         $6      
         26        SEND_VAR                                                 $6
         27        DO_ICALL                                                 
         28      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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