Created
August 26, 2016 15:55
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<?php | |
class VariableStream { | |
var $position; | |
var $varname; | |
function stream_open($path, $mode, $options, &$opened_path) | |
{ | |
$url = parse_url($path); | |
$this->varname = $url["host"]; | |
$this->position = 0; | |
return true; | |
} | |
function stream_read($count) | |
{ | |
$ret = substr($GLOBALS[$this->varname], $this->position, $count); | |
$this->position += strlen($ret); | |
return $ret; | |
} | |
function stream_write($data) | |
{ | |
$left = substr($GLOBALS[$this->varname], 0, $this->position); | |
$right = substr($GLOBALS[$this->varname], $this->position + strlen($data)); | |
$GLOBALS[$this->varname] = $left . $data . $right; | |
$this->position += strlen($data); | |
return strlen($data); | |
} | |
function stream_tell() | |
{ | |
return $this->position; | |
} | |
function stream_eof() | |
{ | |
return $this->position >= strlen($GLOBALS[$this->varname]); | |
} | |
function stream_seek($offset, $whence) | |
{ | |
switch ($whence) { | |
case SEEK_SET: | |
if ($offset < strlen($GLOBALS[$this->varname]) && $offset >= 0) { | |
$this->position = $offset; | |
return true; | |
} else { | |
return false; | |
} | |
break; | |
case SEEK_CUR: | |
if ($offset >= 0) { | |
$this->position += $offset; | |
return true; | |
} else { | |
return false; | |
} | |
break; | |
case SEEK_END: | |
if (strlen($GLOBALS[$this->varname]) + $offset >= 0) { | |
$this->position = strlen($GLOBALS[$this->varname]) + $offset; | |
return true; | |
} else { | |
return false; | |
} | |
break; | |
default: | |
return false; | |
} | |
} | |
function stream_metadata($path, $option, $var) | |
{ | |
if($option == STREAM_META_TOUCH) { | |
$url = parse_url($path); | |
$varname = $url["host"]; | |
if(!isset($GLOBALS[$varname])) { | |
$GLOBALS[$varname] = ''; | |
} | |
return true; | |
} | |
return false; | |
} | |
function stream_lock($option) | |
{ | |
// actual logic omitted for brevity ;-) | |
return true; | |
} | |
} | |
stream_wrapper_register("var", "VariableStream") | |
or die("Failed to register protocol"); | |
$myvar = ""; | |
$fp = fopen("var://myvar", "r+"); | |
var_dump(flock($fp, LOCK_EX)); | |
fwrite($fp, "line1\n"); | |
fwrite($fp, "line2\n"); | |
fwrite($fp, "line3\n"); | |
rewind($fp); | |
while (!feof($fp)) { | |
echo fgets($fp); | |
} | |
fclose($fp); | |
var_dump($myvar); | |
file_put_contents('var://myvar', 'foo', LOCK_EX); | |
var_dump($myvar); |
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