3v4l.org

run code in 300+ PHP versions simultaneously
<?php $mbstringFunctions = array( 'mb_check_encoding', 'mb_convert_encoding', 'mb_substitute_char', ); do { foreach ( $mbstringFunctions as $func ) { if ( !function_exists( $func ) ) { break 2; } } return 1; } while ( false ); return 0;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 11
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 11
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 11
filename:       /in/T3nav
function name:  (null)
number of ops:  16
compiled vars:  !0 = $mbstringFunctions, !1 = $func
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   10     1      > FE_RESET_R                                       $3      !0, ->11
          2    > > FE_FETCH_R                                               $3, !1, ->11
   11     3    >   INIT_FCALL                                               'function_exists'
          4        SEND_VAR                                                 !1
          5        DO_ICALL                                         $4      
          6        BOOL_NOT                                         ~5      $4
          7      > JMPZ                                                     ~5, ->10
   12     8    >   FE_FREE                                                  $3
          9      > JMP                                                      ->14
   10    10    > > JMP                                                      ->2
         11    >   FE_FREE                                                  $3
   16    12      > RETURN                                                   1
   18    13*       JMPNZ                                                    <false>, ->1
   20    14    > > RETURN                                                   0
         15*     > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
160.21 ms | 1395 KiB | 15 Q