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<?php $accountNumber = "NRAITCHEFF"; $analyticsClasses = "N1234567F"; var_dump( strpos( $analyticsClasses, substr($accountNumber, 0, 1) ), is_numeric(strpos( $analyticsClasses, substr($accountNumber, 0, 1) )) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PCpVU
function name:  (null)
number of ops:  28
compiled vars:  !0 = $accountNumber, !1 = $analyticsClasses
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'NRAITCHEFF'
    4     1        ASSIGN                                                   !1, 'N1234567F'
    6     2        INIT_FCALL                                               'var_dump'
    7     3        INIT_FCALL                                               'strpos'
    8     4        SEND_VAR                                                 !1
    9     5        INIT_FCALL                                               'substr'
          6        SEND_VAR                                                 !0
          7        SEND_VAL                                                 0
          8        SEND_VAL                                                 1
          9        DO_ICALL                                         $4      
         10        SEND_VAR                                                 $4
         11        DO_ICALL                                         $5      
         12        SEND_VAR                                                 $5
   11    13        INIT_FCALL                                               'is_numeric'
         14        INIT_FCALL                                               'strpos'
   12    15        SEND_VAR                                                 !1
   13    16        INIT_FCALL                                               'substr'
         17        SEND_VAR                                                 !0
         18        SEND_VAL                                                 0
         19        SEND_VAL                                                 1
         20        DO_ICALL                                         $6      
         21        SEND_VAR                                                 $6
         22        DO_ICALL                                         $7      
         23        SEND_VAR                                                 $7
         24        DO_ICALL                                         $8      
         25        SEND_VAR                                                 $8
         26        DO_ICALL                                                 
   15    27      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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