3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i=1; if (is_string($b = $i)) { echo 'ok'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 5
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
filename:       /in/j0IE0
function name:  (null)
number of ops:  6
compiled vars:  !0 = $i, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1
    5     1        ASSIGN                                           ~3      !1, !0
          2        TYPE_CHECK                                   64          ~3
          3      > JMPZ                                                     ~4, ->5
    6     4    >   ECHO                                                     'ok'
    7     5    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
153.64 ms | 1392 KiB | 13 Q