Description:
------------
fgets() functions returns a line of text form file when length parameter is <= 0. 

fgets() should return a warning message indicating that "length parameter should be greater than 0" but returns a line of text when length parameter is <= 0


This failure is only applicable to PHP 6. 

Consider adding a check for length parameter in the code after paramerts are parsed.

if (len <= 0) {
  php_error_docref(NULL TSRMLS_CC, E_WARNING, "Length parameter must be greater than 0");
  RETURN_FALSE;
}


Reproduce code:
---------------
<?php
  $fp = fopen(__FILE__, "r");
  
  var_dump( fgets($fp, 0) );
  var_dump( fgets($fp, -10) );
  
  fclose($fp);
?>

Expected result:
----------------
Warning: fgets(): Length parameter must be greater than 0 in %s on line %d
bool(false)

Warning: fgets(): Length parameter must be greater than 0 in %s on line %d
bool(false)

Actual result:
--------------
string(7) "<?php
"
string(31) "  $fp = fopen(__FILE__, "r");
"