hphp/test/zend/good/ext-standard-file/fseek_variation3.php

   1 <?php
   2 /* Prototype  : proto int fseek(resource fp, int offset [, int whence])
   3  * Description: Seek on a file pointer
   4  * Source code: ext/standard/file.c
   5  * Alias to functions: gzseek
   6  */
   7
   8 echo "*** Testing fseek() : variation - beyond file boundaries ***\n";
   9
  10 $outputfile = __FILE__.".tmp";
  11
  12 $h = fopen($outputfile, "wb+");
  13 for ($i = 1; $i < 10; $i++) {
  14    fwrite($h, chr(0x30 + $i));
  15 }
  16
  17 echo "--- fseek beyond start of file ---\n";
  18 var_dump(fseek($h, -4, SEEK_SET));
  19 echo "after -4 seek: ".bin2hex(fread($h,1))."\n";
  20 var_dump(fseek($h, -1, SEEK_CUR));
  21 echo "after seek back 1: ".bin2hex(fread($h,1))."\n";
  22 var_dump(fseek($h, -20, SEEK_CUR));
  23 echo "after seek back 20: ".bin2hex(fread($h,1))."\n";
  24
  25 echo "--- fseek beyond end of file ---\n";
  26 var_dump(fseek($h, 16, SEEK_SET));
  27 fwrite($h, b"end");
  28 fseek($h ,0, SEEK_SET);
  29 $data = fread($h, 4096);
  30 echo bin2hex($data)."\n";
  31
  32 fclose($h);
  33 unlink($outputfile);
  34
  35 echo "Done";
  36 ?>