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<?php function starts_with_upper($str) { $chr = mb_substr ($str, 0, 1, "UTF-8"); return mb_strtolower($chr, "UTF-8") != $chr; } print("STARTS WITH 'a': Hello " . starts_with_upper('Hello') . "\n\n"); print("STARTS WITH 'a': hello " . starts_with_upper('hello') . "\n\n");
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/96LHf
function name:  (null)
number of ops:  13
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   INIT_FCALL                                               'starts_with_upper'
          1        SEND_VAL                                                 'Hello'
          2        DO_FCALL                                      0  $0      
          3        CONCAT                                           ~1      'STARTS+WITH+%27a%27%3A+Hello+', $0
          4        CONCAT                                           ~2      ~1, '%0A%0A'
          5        ECHO                                                     ~2
    9     6        INIT_FCALL                                               'starts_with_upper'
          7        SEND_VAL                                                 'hello'
          8        DO_FCALL                                      0  $3      
          9        CONCAT                                           ~4      'STARTS+WITH+%27a%27%3A+hello+', $3
         10        CONCAT                                           ~5      ~4, '%0A%0A'
         11        ECHO                                                     ~5
         12      > RETURN                                                   1

Function starts_with_upper:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/96LHf
function name:  starts_with_upper
number of ops:  15
compiled vars:  !0 = $str, !1 = $chr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        INIT_FCALL                                               'mb_substr'
          2        SEND_VAR                                                 !0
          3        SEND_VAL                                                 0
          4        SEND_VAL                                                 1
          5        SEND_VAL                                                 'UTF-8'
          6        DO_ICALL                                         $2      
          7        ASSIGN                                                   !1, $2
    5     8        INIT_FCALL                                               'mb_strtolower'
          9        SEND_VAR                                                 !1
         10        SEND_VAL                                                 'UTF-8'
         11        DO_ICALL                                         $4      
         12        IS_NOT_EQUAL                                     ~5      !1, $4
         13      > RETURN                                                   ~5
    6    14*     > RETURN                                                   null

End of function starts_with_upper

Generated using Vulcan Logic Dumper, using php 8.0.0


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