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<?php is_string(123); is_string("123");
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/D8aS7
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   TYPE_CHECK                                   64  ~0      123
          1        FREE                                                     ~0
    5     2        TYPE_CHECK                                   64  ~1      '123'
          3        FREE                                                     ~1
          4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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