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<?php function stripNonValidCharaters ($message) { $count = 0; //mostly taken from https://dynmark.uservoice.com/knowledgebase/articles/83496-gsm-alphabet-character-set $search = [ '`', '‘', '’', //single quotes '“', '”', //double quotes '~', '¬', '|' //misc ]; $replace = [ '\'', '\'', '\'', //single quotes '"', '"', //double quotes '-', '-', 'I' //misc ]; $message = str_replace($search, $replace, $message, $count); $validGSMKeycodes = [ 0x0040, 0x0394, 0x0020, 0x0030, 0x00a1, 0x0050, 0x00bf, 0x0070, 0x00A3, 0x005f, 0x0021, 0x0031, 0x0041, 0x0051, 0x0061, 0x0071, 0x0024, 0x03a6, 0x0022, 0x0032, 0x0042, 0x0052, 0x0062, 0x0072, 0x00a5, 0x0393, 0x0023, 0x0033, 0x0043, 0x0053, 0x0063, 0x0073, 0x00e8, 0x039b, 0x00a4, 0x0034, 0x0035, 0x0044, 0x0054, 0x0064, 0x0074, 0x00e9, 0x03a9, 0x0025, 0x0045, 0x0045, 0x0055, 0x0065, 0x0075, 0x00f9, 0x03a0, 0x0026, 0x0036, 0x0046, 0x0056, 0x0066, 0x0076, 0x00ec, 0x03a8, 0x0027, 0x0037, 0x0047, 0x0057, 0x0067, 0x0077, 0x00f2, 0x03a3, 0x0028, 0x0038, 0x0048, 0x0058, 0x0068, 0x0078, 0x00c7, 0x0398, 0x0029, 0x0039, 0x0049, 0x0059, 0x0069, 0x0079, 0x000a, 0x039e, 0x002a, 0x003a, 0x004a, 0x005a, 0x006a, 0x007a, 0x00d8, 0x001b, 0x002b, 0x003b, 0x004b, 0x00c4, 0x006b, 0x00e4, 0x00f8, 0x00c6, 0x002c, 0x003c, 0x004c, 0x00d6, 0x006c, 0x00f6, 0x000d, 0x00e6, 0x002d, 0x003d, 0x004d, 0x00d1, 0x006d, 0x00f1, 0x00c5, 0x00df, 0x002e, 0x003e, 0x004e, 0x00dc, 0x006e, 0x00fc, 0x00e5, 0x00c9, 0x002f, 0x003f, 0x004f, 0x00a7, 0x006f, 0x00e0, 0x03d5, 0x00E8, 0x00E9, 0x00F9, 0x00EC, 0x00F2, 0x00E7, 0x00D8, 0x00A5 ]; for($i = 0; $i < strlen($message); $i++) { if(!in_array(hexdec(bin2hex(mb_substr($message, $i, 1))), $validGSMKeycodes, true)) { $message[$i] = ''; $count++; } } $message = trim($message); return ['message' => $message, 'replacements' => $count]; } $message= "@£\$¥èéùìòÇØøÅåΔ_ΦΓΛΩΠΨΣΘΞÆæßÉ !\"#¤%&'()*+,-./0123456789:;>=<?¡ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÑܧ¿abcdefghijklmnopqrstuvwxyzäöñüàExtended: €[\]^{|}~"; var_dump(stripNonValidCharaters($message));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/rAn2X
function name:  (null)
number of ops:  8
compiled vars:  !0 = $message
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   53     0  E >   ASSIGN                                                   !0, '%40%C2%A3%24%C2%A5%C3%A8%C3%A9%C3%B9%C3%AC%C3%B2%C3%87%C3%98%C3%B8%C3%85%C3%A5%CE%94_%CE%A6%CE%93%CE%9B%CE%A9%CE%A0%CE%A8%CE%A3%CE%98%CE%9E%C3%86%C3%A6%C3%9F%C3%89+%21%22%23%C2%A4%25%26%27%28%29%2A%2B%2C-.%2F0123456789%3A%3B%3E%3D%3C%3F%C2%A1ABCDEFGHIJKLMNOPQRSTUVWXYZ%C3%84%C3%96%C3%91%C3%9C%C2%A7%C2%BFabcdefghijklmnopqrstuvwxyz%C3%A4%C3%B6%C3%B1%C3%BC%C3%A0Extended%3A+%E2%82%AC%5B%5C%5D%5E%7B%7C%7D%7E'
   55     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'stripnonvalidcharaters'
          3        SEND_VAR                                                 !0
          4        DO_FCALL                                      0  $2      
          5        SEND_VAR                                                 $2
          6        DO_ICALL                                                 
          7      > RETURN                                                   1

Function stripnonvalidcharaters:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 36
Branch analysis from position: 36
2 jumps found. (Code = 44) Position 1 = 39, Position 2 = 14
Branch analysis from position: 39
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 14
2 jumps found. (Code = 43) Position 1 = 32, Position 2 = 35
Branch analysis from position: 32
2 jumps found. (Code = 44) Position 1 = 39, Position 2 = 14
Branch analysis from position: 39
Branch analysis from position: 14
Branch analysis from position: 35
filename:       /in/rAn2X
function name:  stripNonValidCharaters
number of ops:  47
compiled vars:  !0 = $message, !1 = $count, !2 = $search, !3 = $replace, !4 = $validGSMKeycodes, !5 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        ASSIGN                                                   !1, 0
    7     2        ASSIGN                                                   !2, <array>
   12     3        ASSIGN                                                   !3, <array>
   18     4        INIT_FCALL                                               'str_replace'
          5        SEND_VAR                                                 !2
          6        SEND_VAR                                                 !3
          7        SEND_VAR                                                 !0
          8        SEND_REF                                                 !1
          9        DO_ICALL                                         $9      
         10        ASSIGN                                                   !0, $9
   20    11        ASSIGN                                                   !4, <array>
   41    12        ASSIGN                                                   !5, 0
         13      > JMP                                                      ->36
   42    14    >   INIT_FCALL                                               'in_array'
         15        INIT_FCALL                                               'hexdec'
         16        INIT_FCALL                                               'bin2hex'
         17        INIT_FCALL                                               'mb_substr'
         18        SEND_VAR                                                 !0
         19        SEND_VAR                                                 !5
         20        SEND_VAL                                                 1
         21        DO_ICALL                                         $13     
         22        SEND_VAR                                                 $13
         23        DO_ICALL                                         $14     
         24        SEND_VAR                                                 $14
         25        DO_ICALL                                         $15     
         26        SEND_VAR                                                 $15
         27        SEND_VAR                                                 !4
         28        SEND_VAL                                                 <true>
         29        DO_ICALL                                         $16     
         30        BOOL_NOT                                         ~17     $16
         31      > JMPZ                                                     ~17, ->35
   43    32    >   ASSIGN_DIM                                               !0, !5
         33        OP_DATA                                                  ''
   44    34        PRE_INC                                                  !1
   41    35    >   PRE_INC                                                  !5
         36    >   STRLEN                                           ~21     !0
         37        IS_SMALLER                                               !5, ~21
         38      > JMPNZ                                                    ~22, ->14
   47    39    >   INIT_FCALL                                               'trim'
         40        SEND_VAR                                                 !0
         41        DO_ICALL                                         $23     
         42        ASSIGN                                                   !0, $23
   49    43        INIT_ARRAY                                       ~25     !0, 'message'
         44        ADD_ARRAY_ELEMENT                                ~25     !1, 'replacements'
         45      > RETURN                                                   ~25
   50    46*     > RETURN                                                   null

End of function stripnonvalidcharaters

Generated using Vulcan Logic Dumper, using php 8.0.0


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