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<?php $a = "2015-10-31"; echo date("Y-m-01", strtotime($a)); echo date("Y-m-d", strtotime($a."+1 month"));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VeSKN
function name:  (null)
number of ops:  19
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '2015-10-31'
    4     1        INIT_FCALL                                               'date'
          2        SEND_VAL                                                 'Y-m-01'
          3        INIT_FCALL                                               'strtotime'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        SEND_VAR                                                 $2
          7        DO_ICALL                                         $3      
          8        ECHO                                                     $3
    5     9        INIT_FCALL                                               'date'
         10        SEND_VAL                                                 'Y-m-d'
         11        INIT_FCALL                                               'strtotime'
         12        CONCAT                                           ~4      !0, '%2B1+month'
         13        SEND_VAL                                                 ~4
         14        DO_ICALL                                         $5      
         15        SEND_VAR                                                 $5
         16        DO_ICALL                                         $6      
         17        ECHO                                                     $6
         18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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