3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = (string)trim('0'); if (empty($var)) { echo "empty\n\n";}else{ echo "not empty\n\n";} var_dump($var);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/nJq79
function name:  (null)
number of ops:  14
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'trim'
          1        SEND_VAL                                                 '0'
          2        DO_ICALL                                         $1      
          3        CAST                                          6  ~2      $1
          4        ASSIGN                                                   !0, ~2
    4     5        ISSET_ISEMPTY_CV                                         !0
          6      > JMPZ                                                     ~4, ->9
          7    >   ECHO                                                     'empty%0A%0A'
          8      > JMP                                                      ->10
          9    >   ECHO                                                     'not+empty%0A%0A'
    6    10    >   INIT_FCALL                                               'var_dump'
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
172.26 ms | 1394 KiB | 17 Q