<?

class Debug {

private $fh; // file handle to write errors to

private $on = true;

private $logFile;

private function openFileHandle (){

if (!is_resource($this->fh))

$this->fh = fopen ($this->logFile, "a");

}

private function closeFileHandle (){

if (!is_resource($this->fh))

$this->fh = fclose ($this->logFile);

}

/**

* Constructor. Open file handle to write data to

*

* @param on If set to true, enable debugging. If false, disable debugging

*/

public function __construct (

$on = true,

$logFile = "/tmp/log"

){

date_default_timezone_set("America/Los_Angeles");

if ($on !== true){

$this->on = false;

return;

}

$this->logFile = $logFile;

$this->log("Debug::__construct()");

}

public function __destruct (){

$this->log("Debug::__destruct()");

if ($this->on)

fclose ($this->fh);

}

/**

* Write a log message

* @param data The data to write out. If a string, just write out,

* otherwise, var_dump it

* @return void

*/

public function log (

$data

){

if ($this->on === false)

return;

if (!is_array($data))

$data = array($data);

$out = "";

foreach ($data as $d){

if (is_string($d)){

$out .= $d;

} else {

ob_start();

var_dump($d);

$out .= ob_get_contents();

ob_end_clean();

}

}

$out = rtrim ($out);

$out = date("Y-m-d H:i:s") . "\t" . $out . "\n";

$this->openFileHandle();

fwrite($this->fh, $out);

$this->closeFileHandle();

}

}

/**

* Standalone function to provide stack traces. Not really used much, but

* useful for diagnosing specific issues

*/

function stacktrace (

$errno = null,

$errstr = null,

$errfile = null,

$errline = null

){

echo "stacktrace:\n";

var_dump(debug_backtrace());

}

?>