3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<? $string = 'e23e23'; function checkValid($string) { preg_match('/[^A-Za-z0-9.#\\-$]/', $str) ? true : false; }
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/dEBfL
function name:  (null)
number of ops:  3
compiled vars:  !0 = $string
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, 'e23e23'
   3     1        NOP                                                      
   5     2      > RETURN                                                   1

Function checkvalid:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
Jump found. Position 1 = 9
Branch analysis from position: 9
Jump found. Position 1 = -2
Branch analysis from position: 8
Jump found. Position 1 = -2
filename:       /in/dEBfL
function name:  checkValid
number of ops:  11
compiled vars:  !0 = $string, !1 = $str
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   RECV                                             !0      
   4     1        INIT_FCALL                                               'preg_match'
         2        SEND_VAL                                                 '%2F%5B%5EA-Za-z0-9.%23%5C-%24%5D%2F'
         3        SEND_VAR                                                 !1
         4        DO_ICALL                                         $2      
         5      > JMPZ                                                     $2, ->8
         6    >   QM_ASSIGN                                        ~3      <true>
         7      > JMP                                                      ->9
         8    >   QM_ASSIGN                                        ~3      <false>
         9    >   FREE                                                     ~3
   5    10      > RETURN                                                   null

End of function checkvalid

Generated using Vulcan Logic Dumper, using php 7.2.0