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<?php $daysData = array('1MO'); $weekDay = substr($daysData[0], - 2); $dayPosition = substr($daysData[0], 0, strlen($daysData[0] - 2)); var_dump($weekDay, $dayPosition);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/RZe7G
function name:  (null)
number of ops:  22
compiled vars:  !0 = $daysData, !1 = $weekDay, !2 = $dayPosition
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        INIT_FCALL                                               'substr'
          2        FETCH_DIM_R                                      ~4      !0, 0
          3        SEND_VAL                                                 ~4
          4        SEND_VAL                                                 -2
          5        DO_ICALL                                         $5      
          6        ASSIGN                                                   !1, $5
    6     7        INIT_FCALL                                               'substr'
          8        FETCH_DIM_R                                      ~7      !0, 0
          9        SEND_VAL                                                 ~7
         10        SEND_VAL                                                 0
         11        FETCH_DIM_R                                      ~8      !0, 0
         12        SUB                                              ~9      ~8, 2
         13        STRLEN                                           ~10     ~9
         14        SEND_VAL                                                 ~10
         15        DO_ICALL                                         $11     
         16        ASSIGN                                                   !2, $11
    8    17        INIT_FCALL                                               'var_dump'
         18        SEND_VAR                                                 !1
         19        SEND_VAR                                                 !2
         20        DO_ICALL                                                 
         21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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