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<?php $gmp = gmp_init(0); $bool = (bool) $gmp; var_dump($bool);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/LHpD1
function name:  (null)
number of ops:  10
compiled vars:  !0 = $gmp, !1 = $bool
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL_BY_NAME                                           'gmp_init'
          1        SEND_VAL_EX                                                  0
          2        DO_FCALL                                          0  $2      
          3        ASSIGN                                                       !0, $2
    5     4        BOOL                                                 ~4      !0
          5        ASSIGN                                                       !1, ~4
    6     6        INIT_FCALL                                                   'var_dump'
          7        SEND_VAR                                                     !1
          8        DO_ICALL                                                     
          9      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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