3v4l.org

run code in 300+ PHP versions simultaneously
<?php $domainPart = ' domain.com'; $regexChar = '/^[\x{0100}-\x{017f}]{1,63}$/iu'; preg_match($regexChar, $domainPart, $matches); print_r($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DR3S5
function name:  (null)
number of ops:  11
compiled vars:  !0 = $domainPart, !1 = $regexChar, !2 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '+domain.com'
    5     1        ASSIGN                                                   !1, '%2F%5E%5B%5Cx%7B0100%7D-%5Cx%7B017f%7D%5D%7B1%2C63%7D%24%2Fiu'
    7     2        INIT_FCALL                                               'preg_match'
          3        SEND_VAR                                                 !1
          4        SEND_VAR                                                 !0
          5        SEND_REF                                                 !2
          6        DO_ICALL                                                 
    9     7        INIT_FCALL                                               'print_r'
          8        SEND_VAR                                                 !2
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
166.66 ms | 1394 KiB | 17 Q