$2$3', $string);
$string = preg_replace('#(^|[\n \-\*/\.])_(.+?)_($|[ \-\*/\.\!\?,:])#is', '$1$2$3', $string);
$string = preg_replace('#(^|[\n \-_\*\.])/(.+?)/($|[ \-_\*\.\!\?,:])#is', '$1$2$3', $string);
return nl2br($string);
}
/**
* Common initialization for download and downloadToFile
* Return file handle to header file
*/
private static function initCurl($url, $timeout, &$head)
{
$ch = curl_init();
if ($ch === false) Util::traceError('Could not initialize cURL');
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, ceil($timeout / 2));
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 6);
$tmpfile = '/tmp/' . mt_rand() . '-' . time();
$head = fopen($tmpfile, 'w+b');
if ($head === false) Util::traceError("Could not open temporary head file $tmpfile for writing.");
curl_setopt($ch, CURLOPT_WRITEHEADER, $head);
return $ch;
}
/**
* Read 10kb from the given file handle, seek to 0 first,
* close the file after reading. Returns data read
*/
private static function getContents($fh)
{
fseek($fh, 0, SEEK_SET);
$data = fread($fh, 10000);
fclose($fh);
return $data;
}
/**
* Download file, obey given timeout in seconds
* Return data on success, false on failure
*/
public static function download($url, $timeout, &$code)
{
$ch = self::initCurl($url, $timeout, $head);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = curl_exec($ch);
$head = self::getContents($head);
if (preg_match('#^HTTP/\d+\.\d+ (\d+) #', $head, $out)) {
$code = (int)$out[1];
} else {
$code = 999;
}
curl_close($ch);
return $data;
}
/**
* Download file, obey given timeout in seconds
* Return true on success, false on failure
*/
public static function downloadToFile($target, $url, $timeout, &$code)
{
$fh = fopen($target, 'wb');
if ($fh === false) Util::traceError("Could not open $target for writing.");
$ch = self::initCurl($url, $timeout, $head);
curl_setopt($ch, CURLOPT_FILE, $fh);
$res = curl_exec($ch);
$head = self::getContents($head);
curl_close($ch);
fclose($fh);
if ($res === false) {
@unlink($target);
return false;
}
if (preg_match('#^HTTP/\d+\.\d+ (\d+) #', $head, $out)) {
$code = (int)$out[1];
} else {
$code = '999 ' . curl_error($ch);
}
return true;
}
/**
* Convert given number to human readable file size string.
* Will append Bytes, KiB, etc. depending on magnitude of number.
*
* @param type $bytes numeric value of the filesize to make readable
* @param type $decimals number of decimals to show, -1 for automatic
* @return type human readable string representing the given filesize
*/
public static function readableFileSize($bytes, $decimals = -1) {
static $sz = array('Byte', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB');
$factor = floor((strlen($bytes) - 1) / 3);
if ($factor == 0) {
$decimals = 0;
} elseif ($decimals === -1) {
$decimals = 2 - floor((strlen($bytes) - 1) % 3);
}
return sprintf("%.{$decimals}f ", $bytes / pow(1024, $factor)) . $sz[$factor];
}
public static function sanitizeFilename($name)
{
return preg_replace('/[^a-zA-Z0-9_\-]+/', '_', $name);
}
/**
* Create human readable error description from a $_FILES[<..>]['error'] code
*
* @param int $code the code to turn into an error description
* @return string the error description
*/
public static function uploadErrorString($code)
{
switch ($code) {
case UPLOAD_ERR_INI_SIZE:
$message = "The uploaded file exceeds the upload_max_filesize directive in php.ini";
break;
case UPLOAD_ERR_FORM_SIZE:
$message = "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form";
break;
case UPLOAD_ERR_PARTIAL:
$message = "The uploaded file was only partially uploaded";
break;
case UPLOAD_ERR_NO_FILE:
$message = "No file was uploaded";
break;
case UPLOAD_ERR_NO_TMP_DIR:
$message = "Missing a temporary folder";
break;
case UPLOAD_ERR_CANT_WRITE:
$message = "Failed to write file to disk";
break;
case UPLOAD_ERR_EXTENSION:
$message = "File upload stopped by extension";
break;
default:
$message = "Unknown upload error";
break;
}
return $message;
}
}