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<?php function validateStringByPrefix1(string $string, $prefix) { $valid = false; if (is_string($prefix)) { if (! empty($prefix) && strpos($string, $prefix) === 0) { $valid = true; } } elseif (is_array($prefix)) { foreach ($prefix as $partPrefix) { if (! empty($partPrefix) && strpos($string, $partPrefix) === 0) { $valid = true; break; } } } return $valid; } function validateStringByPrefix2(string $string, $prefix) { $valid = false; if (is_string($prefix)) { if (strpos($string, $prefix) === 0) { $valid = true; } } elseif (is_array($prefix)) { foreach ($prefix as $partPrefix) { if (! empty($partPrefix) && strpos($string, $partPrefix) === 0) { $valid = true; break; } } } return $valid; } $t = microtime(true); var_dump(validateStringByPrefix2("foo", "bar")); printf("2 %.6fs\n", microtime(true) - $t); $t = microtime(true); var_dump(validateStringByPrefix1("foo", "bar")); printf("1 %.6fs\n", microtime(true) - $t);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ThVnN
function name:  (null)
number of ops:  39
compiled vars:  !0 = $t
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   42     0  E >   INIT_FCALL                                               'microtime'
          1        SEND_VAL                                                 <true>
          2        DO_ICALL                                         $1      
          3        ASSIGN                                                   !0, $1
   43     4        INIT_FCALL                                               'var_dump'
          5        INIT_FCALL                                               'validatestringbyprefix2'
          6        SEND_VAL                                                 'foo'
          7        SEND_VAL                                                 'bar'
          8        DO_FCALL                                      0  $3      
          9        SEND_VAR                                                 $3
         10        DO_ICALL                                                 
   44    11        INIT_FCALL                                               'printf'
         12        SEND_VAL                                                 '2+%25.6fs%0A'
         13        INIT_FCALL                                               'microtime'
         14        SEND_VAL                                                 <true>
         15        DO_ICALL                                         $5      
         16        SUB                                              ~6      $5, !0
         17        SEND_VAL                                                 ~6
         18        DO_ICALL                                                 
   46    19        INIT_FCALL                                               'microtime'
         20        SEND_VAL                                                 <true>
         21        DO_ICALL                                         $8      
         22        ASSIGN                                                   !0, $8
   47    23        INIT_FCALL                                               'var_dump'
         24        INIT_FCALL                                               'validatestringbyprefix1'
         25        SEND_VAL                                                 'foo'
         26        SEND_VAL                                                 'bar'
         27        DO_FCALL                                      0  $10     
         28        SEND_VAR                                                 $10
         29        DO_ICALL                                                 
   48    30        INIT_FCALL                                               'printf'
         31        SEND_VAL                                                 '1+%25.6fs%0A'
         32        INIT_FCALL                                               'microtime'
         33        SEND_VAL                                                 <true>
         34        DO_ICALL                                         $12     
         35        SUB                                              ~13     $12, !0
         36        SEND_VAL                                                 ~13
         37        DO_ICALL                                                 
         38      > RETURN                                                   1

Function validatestringbyprefix1:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 17
Branch analysis from position: 5
2 jumps found. (Code = 46) Position 1 = 8, Position 2 = 14
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 15, Position 2 = 16
Branch analysis from position: 15
1 jumps found. (Code = 42) Position 1 = 35
Branch analysis from position: 35
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
Branch analysis from position: 14
Branch analysis from position: 17
2 jumps found. (Code = 43) Position 1 = 19, Position 2 = 35
Branch analysis from position: 19
2 jumps found. (Code = 77) Position 1 = 20, Position 2 = 34
Branch analysis from position: 20
2 jumps found. (Code = 78) Position 1 = 21, Position 2 = 34
Branch analysis from position: 21
2 jumps found. (Code = 46) Position 1 = 24, Position 2 = 30
Branch analysis from position: 24
2 jumps found. (Code = 43) Position 1 = 31, Position 2 = 33
Branch analysis from position: 31
1 jumps found. (Code = 42) Position 1 = 34
Branch analysis from position: 34
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 33
1 jumps found. (Code = 42) Position 1 = 20
Branch analysis from position: 20
Branch analysis from position: 30
Branch analysis from position: 34
Branch analysis from position: 34
Branch analysis from position: 35
filename:       /in/ThVnN
function name:  validateStringByPrefix1
number of ops:  37
compiled vars:  !0 = $string, !1 = $prefix, !2 = $valid, !3 = $partPrefix
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    5     2        ASSIGN                                                   !2, <false>
    6     3        TYPE_CHECK                                   64          !1
          4      > JMPZ                                                     ~5, ->17
    7     5    >   ISSET_ISEMPTY_CV                                 ~6      !1
          6        BOOL_NOT                                         ~7      ~6
          7      > JMPZ_EX                                          ~7      ~7, ->14
          8    >   INIT_FCALL                                               'strpos'
          9        SEND_VAR                                                 !0
         10        SEND_VAR                                                 !1
         11        DO_ICALL                                         $8      
         12        IS_IDENTICAL                                     ~9      $8, 0
         13        BOOL                                             ~7      ~9
         14    > > JMPZ                                                     ~7, ->16
    8    15    >   ASSIGN                                                   !2, <true>
    6    16    > > JMP                                                      ->35
   10    17    >   TYPE_CHECK                                  128          !1
         18      > JMPZ                                                     ~11, ->35
   11    19    > > FE_RESET_R                                       $12     !1, ->34
         20    > > FE_FETCH_R                                               $12, !3, ->34
   12    21    >   ISSET_ISEMPTY_CV                                 ~13     !3
         22        BOOL_NOT                                         ~14     ~13
         23      > JMPZ_EX                                          ~14     ~14, ->30
         24    >   INIT_FCALL                                               'strpos'
         25        SEND_VAR                                                 !0
         26        SEND_VAR                                                 !3
         27        DO_ICALL                                         $15     
         28        IS_IDENTICAL                                     ~16     $15, 0
         29        BOOL                                             ~14     ~16
         30    > > JMPZ                                                     ~14, ->33
   13    31    >   ASSIGN                                                   !2, <true>
   14    32      > JMP                                                      ->34
   11    33    > > JMP                                                      ->20
         34    >   FE_FREE                                                  $12
   18    35    > > RETURN                                                   !2
   19    36*     > RETURN                                                   null

End of function validatestringbyprefix1

Function validatestringbyprefix2:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 13
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 12
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 31
Branch analysis from position: 31
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
Branch analysis from position: 13
2 jumps found. (Code = 43) Position 1 = 15, Position 2 = 31
Branch analysis from position: 15
2 jumps found. (Code = 77) Position 1 = 16, Position 2 = 30
Branch analysis from position: 16
2 jumps found. (Code = 78) Position 1 = 17, Position 2 = 30
Branch analysis from position: 17
2 jumps found. (Code = 46) Position 1 = 20, Position 2 = 26
Branch analysis from position: 20
2 jumps found. (Code = 43) Position 1 = 27, Position 2 = 29
Branch analysis from position: 27
1 jumps found. (Code = 42) Position 1 = 30
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 29
1 jumps found. (Code = 42) Position 1 = 16
Branch analysis from position: 16
Branch analysis from position: 26
Branch analysis from position: 30
Branch analysis from position: 30
Branch analysis from position: 31
filename:       /in/ThVnN
function name:  validateStringByPrefix2
number of ops:  33
compiled vars:  !0 = $string, !1 = $prefix, !2 = $valid, !3 = $partPrefix
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   21     0  E >   RECV                                             !0      
          1        RECV                                             !1      
   23     2        ASSIGN                                                   !2, <false>
   24     3        TYPE_CHECK                                   64          !1
          4      > JMPZ                                                     ~5, ->13
   25     5    >   INIT_FCALL                                               'strpos'
          6        SEND_VAR                                                 !0
          7        SEND_VAR                                                 !1
          8        DO_ICALL                                         $6      
          9        IS_IDENTICAL                                             $6, 0
         10      > JMPZ                                                     ~7, ->12
   26    11    >   ASSIGN                                                   !2, <true>
   24    12    > > JMP                                                      ->31
   28    13    >   TYPE_CHECK                                  128          !1
         14      > JMPZ                                                     ~9, ->31
   29    15    > > FE_RESET_R                                       $10     !1, ->30
         16    > > FE_FETCH_R                                               $10, !3, ->30
   30    17    >   ISSET_ISEMPTY_CV                                 ~11     !3
         18        BOOL_NOT                                         ~12     ~11
         19      > JMPZ_EX                                          ~12     ~12, ->26
         20    >   INIT_FCALL                                               'strpos'
         21        SEND_VAR                                                 !0
         22        SEND_VAR                                                 !3
         23        DO_ICALL                                         $13     
         24        IS_IDENTICAL                                     ~14     $13, 0
         25        BOOL                                             ~12     ~14
         26    > > JMPZ                                                     ~12, ->29
   31    27    >   ASSIGN                                                   !2, <true>
   32    28      > JMP                                                      ->30
   29    29    > > JMP                                                      ->16
         30    >   FE_FREE                                                  $10
   36    31    > > RETURN                                                   !2
   37    32*     > RETURN                                                   null

End of function validatestringbyprefix2

Generated using Vulcan Logic Dumper, using php 8.0.0


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