3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tests = ['hi', 'hi<', 'what&now', '', '&gt;', "\t"]; foreach ($tests as $test) { if (!preg_match('~^[^ <>&\t]+$~', $test)) { $test = 'anonymous'; } echo "$test\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 14
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 14
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 9, Position 2 = 10
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 10
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 14
filename:       /in/gOKjq
function name:  (null)
number of ops:  16
compiled vars:  !0 = $tests, !1 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1      > FE_RESET_R                                       $3      !0, ->14
          2    > > FE_FETCH_R                                               $3, !1, ->14
    5     3    >   INIT_FCALL                                               'preg_match'
          4        SEND_VAL                                                 '%7E%5E%5B%5E+%3C%3E%26%5Ct%5D%2B%24%7E'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                         $4      
          7        BOOL_NOT                                         ~5      $4
          8      > JMPZ                                                     ~5, ->10
    6     9    >   ASSIGN                                                   !1, 'anonymous'
    8    10    >   NOP                                                      
         11        FAST_CONCAT                                      ~7      !1, '%0A'
         12        ECHO                                                     ~7
    4    13      > JMP                                                      ->2
         14    >   FE_FREE                                                  $3
    9    15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
143.74 ms | 1395 KiB | 15 Q