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<?php $str = trim('0'); if ($str) { echo "option 1: not empty\n"; } if (strlen($str)) { echo "option 2: not empty\n"; } if (!empty($str)) { echo "option 3: not empty\n"; } if ($str !== '') { echo "option 4: not empty\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 6
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 9
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 13
Branch analysis from position: 12
2 jumps found. (Code = 43) Position 1 = 15, Position 2 = 16
Branch analysis from position: 15
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
Branch analysis from position: 13
Branch analysis from position: 9
Branch analysis from position: 6
filename:       /in/jcOFl
function name:  (null)
number of ops:  17
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'trim'
          1        SEND_VAL                                                 '0'
          2        DO_ICALL                                         $1      
          3        ASSIGN                                                   !0, $1
    4     4      > JMPZ                                                     !0, ->6
    5     5    >   ECHO                                                     'option+1%3A+not+empty%0A'
    8     6    >   STRLEN                                           ~3      !0
          7      > JMPZ                                                     ~3, ->9
    9     8    >   ECHO                                                     'option+2%3A+not+empty%0A'
   12     9    >   ISSET_ISEMPTY_CV                                 ~4      !0
         10        BOOL_NOT                                         ~5      ~4
         11      > JMPZ                                                     ~5, ->13
   13    12    >   ECHO                                                     'option+3%3A+not+empty%0A'
   16    13    >   IS_NOT_IDENTICAL                                         !0, ''
         14      > JMPZ                                                     ~6, ->16
   17    15    >   ECHO                                                     'option+4%3A+not+empty%0A'
   18    16    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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