3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( preg_match('/^pa\d{2}$/', 'pa04'), preg_match('/^pa\d{2}$/', 'c01'), preg_match('/^c\d{2}$/', 'c02'), preg_match('/^c\d{2}$/', 'pa03'), );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hsFv0
function name:  (null)
number of ops:  23
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
    4     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5Epa%5Cd%7B2%7D%24%2F'
          3        SEND_VAL                                                 'pa04'
          4        DO_ICALL                                         $0      
          5        SEND_VAR                                                 $0
    5     6        INIT_FCALL                                               'preg_match'
          7        SEND_VAL                                                 '%2F%5Epa%5Cd%7B2%7D%24%2F'
          8        SEND_VAL                                                 'c01'
          9        DO_ICALL                                         $1      
         10        SEND_VAR                                                 $1
    6    11        INIT_FCALL                                               'preg_match'
         12        SEND_VAL                                                 '%2F%5Ec%5Cd%7B2%7D%24%2F'
         13        SEND_VAL                                                 'c02'
         14        DO_ICALL                                         $2      
         15        SEND_VAR                                                 $2
    7    16        INIT_FCALL                                               'preg_match'
         17        SEND_VAL                                                 '%2F%5Ec%5Cd%7B2%7D%24%2F'
         18        SEND_VAL                                                 'pa03'
         19        DO_ICALL                                         $3      
         20        SEND_VAR                                                 $3
         21        DO_ICALL                                                 
    8    22      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
155.95 ms | 1395 KiB | 17 Q