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<?php function csv_reverse($handle, ...$csv_options) { $offsets = []; do { $offsets[] = ftell($handle); } while($row = fgetcsv($handle, ...$csv_options)); array_pop($offsets); // last offset is EOF for( $i=count($offsets)-1; $i>=0; --$i ) { fseek($handle, $offsets[$i]); yield fgetcsv($handle, ...$csv_options); } } $csv = <<<_E_ id,name,value 1,foo,"hello world" 2,bar,"hello world" 3, baz,"""hello world""" _E_; $in = fopen('php://memory', 'rwb'); fwrite($in, $csv); rewind($in); fgets($in); foreach( csv_reverse($in, null, ',', '"', '\\') as $row ) { var_dump($row); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 24, Position 2 = 29
Branch analysis from position: 24
2 jumps found. (Code = 78) Position 1 = 25, Position 2 = 29
Branch analysis from position: 25
1 jumps found. (Code = 42) Position 1 = 24
Branch analysis from position: 24
Branch analysis from position: 29
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 29
filename:       /in/0sc8q
function name:  (null)
number of ops:  31
compiled vars:  !0 = $csv, !1 = $in, !2 = $row
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   16     0  E >   ASSIGN                                                   !0, 'id%2Cname%2Cvalue%0A1%2Cfoo%2C%22hello+world%22%0A2%2Cbar%2C%22hello+%0Aworld%22%0A3%2C+baz%2C%22%22%22hello+%0Aworld%22%22%22'
   25     1        INIT_FCALL                                               'fopen'
          2        SEND_VAL                                                 'php%3A%2F%2Fmemory'
          3        SEND_VAL                                                 'rwb'
          4        DO_ICALL                                         $4      
          5        ASSIGN                                                   !1, $4
   26     6        INIT_FCALL                                               'fwrite'
          7        SEND_VAR                                                 !1
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                                 
   27    10        INIT_FCALL                                               'rewind'
         11        SEND_VAR                                                 !1
         12        DO_ICALL                                                 
   28    13        INIT_FCALL                                               'fgets'
         14        SEND_VAR                                                 !1
         15        DO_ICALL                                                 
   30    16        INIT_FCALL                                               'csv_reverse'
         17        SEND_VAR                                                 !1
         18        SEND_VAL                                                 null
         19        SEND_VAL                                                 '%2C'
         20        SEND_VAL                                                 '%22'
         21        SEND_VAL                                                 '%5C'
         22        DO_FCALL                                      0  $9      
         23      > FE_RESET_R                                       $10     $9, ->29
         24    > > FE_FETCH_R                                               $10, !2, ->29
   31    25    >   INIT_FCALL                                               'var_dump'
         26        SEND_VAR                                                 !2
         27        DO_ICALL                                                 
   30    28      > JMP                                                      ->24
         29    >   FE_FREE                                                  $10
   32    30      > RETURN                                                   1

Function csv_reverse:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 44) Position 1 = 16, Position 2 = 4
Branch analysis from position: 16
1 jumps found. (Code = 42) Position 1 = 35
Branch analysis from position: 35
2 jumps found. (Code = 44) Position 1 = 37, Position 2 = 23
Branch analysis from position: 37
1 jumps found. (Code = 161) Position 1 = -2
Branch analysis from position: 23
2 jumps found. (Code = 44) Position 1 = 37, Position 2 = 23
Branch analysis from position: 37
Branch analysis from position: 23
Branch analysis from position: 4
filename:       /in/0sc8q
function name:  csv_reverse
number of ops:  38
compiled vars:  !0 = $handle, !1 = $csv_options, !2 = $offsets, !3 = $row, !4 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV_VARIADIC                                    !1      
          2        GENERATOR_CREATE                                         
    4     3        ASSIGN                                                   !2, <array>
    6     4    >   INIT_FCALL                                               'ftell'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                         $7      
          7        ASSIGN_DIM                                               !2
          8        OP_DATA                                                  $7
    7     9        INIT_FCALL                                               'fgetcsv'
         10        SEND_VAR                                                 !0
         11        SEND_UNPACK                                              !1
         12        CHECK_UNDEF_ARGS                                         
         13        DO_ICALL                                         $8      
         14        ASSIGN                                           ~9      !3, $8
         15      > JMPNZ                                                    ~9, ->4
    8    16    >   INIT_FCALL                                               'array_pop'
         17        SEND_REF                                                 !2
         18        DO_ICALL                                                 
   10    19        COUNT                                            ~11     !2
         20        SUB                                              ~12     ~11, 1
         21        ASSIGN                                                   !4, ~12
         22      > JMP                                                      ->35
   11    23    >   INIT_FCALL                                               'fseek'
         24        SEND_VAR                                                 !0
         25        FETCH_DIM_R                                      ~14     !2, !4
         26        SEND_VAL                                                 ~14
         27        DO_ICALL                                                 
   12    28        INIT_FCALL                                               'fgetcsv'
         29        SEND_VAR                                                 !0
         30        SEND_UNPACK                                              !1
         31        CHECK_UNDEF_ARGS                                         
         32        DO_ICALL                                         $16     
         33        YIELD                                                    $16
   10    34        PRE_DEC                                                  !4
         35    >   IS_SMALLER_OR_EQUAL                                      0, !4
         36      > JMPNZ                                                    ~19, ->23
   14    37    > > GENERATOR_RETURN                                         

End of function csv_reverse

Generated using Vulcan Logic Dumper, using php 8.0.0


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141.37 ms | 1016 KiB | 23 Q