Class: Stream_Var

[line 83]
Stream wrapper to access a variable

Stream wrappers allow you to access any datasource using PHP's file manipulation functions like fopen(), fclose(), fseek(), ftell(),.. as well as directory functions like opendir() readdir() and closedir().

This wrapper allows you to access any variable using these functions. You have to specify a scope (GLOBALS, _GET, _POST, etc.) as the host and the variable name as the path. If you want to access a string, that is stored in an array, you can use this array like you would use a directory.

Usage:

  require_once '../Var.php';

  stream_wrapper_register( "var", "Stream_Var" );
 
  $fp = fopen('var://GLOBALS/myArray/index','r');
  $data = fread($fp,100);
  fclose($fp);

This wrapper also has support for dir functions, so it's possible to read any array, like you would read a directory. The following code will list all keys in an array. You could use fopen() to read the values for the keys.

  require_once '../Var.php';

  stream_wrapper_register( "var", "Stream_Var" );
 
  $dh = opendir('var://_SERVER');
  while ($entry = readdir($dh)) {
      echo $entry."<br />";
  }
  closedir($dh);

This wrapper allows you to replace files and directories with structures in memory in any application, that relies on filesystem functions. But keep in mind that variables are not persistent during several request, unless you write to var://SESSION. But this can be used to replace temporary files with variables.

dir_closedir   [line 457]

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dir_opendir   [line 426]

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dir_readdir   [line 487]

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dir_rewinddir   [line 470]

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stream_close   [line 211]

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stream_eof   [line 187]

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stream_flush   [line 323]

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stream_open   [line 128]

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stream_read   [line 226]

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stream_seek   [line 281]

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stream_stat   [line 335]

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stream_tell   [line 199]

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stream_write   [line 250]

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url_stat   [line 390]

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