Try to detect gzopen64 function

rainloop/v/0.0.0/app/libraries/pclzip/pclzip.lib.php

@@ -204,6 +204,8 @@
     // The class can then disable the magic_quotes and reset it after
     var $magic_quotes_status;
 
+    var $bUseGzopen64;
+
   // --------------------------------------------------------------------------------
   // Function : PclZip()
   // Description :
@@ -216,11 +218,13 @@
   {
 
     // ----- Tests the zlib
-    if (!function_exists('gzopen'))
+    if (!function_exists('gzopen') && !function_exists('gzopen64'))
     {
       die('Abort '.basename(__FILE__).' : Missing zlib extensions');
     }
 
+	$this->bUseGzopen64 = !function_exists('gzopen') && function_exists('gzopen64');
+
     // ----- Set the attributes
     $this->zipname = $p_zipname;
     $this->zip_fd = 0;
@@ -2811,11 +2815,22 @@
 
     // ----- Creates a compressed temporary file
     $v_gzip_temp_name = PCLZIP_TEMPORARY_DIR.uniqid('pclzip-').'.gz';
+	if ($this->bUseGzopen64)
+	{
+		if (($v_file_compressed = @gzopen64($v_gzip_temp_name, "wb")) == 0) {
+		  fclose($v_file);
+		  PclZip::privErrorLog(PCLZIP_ERR_WRITE_OPEN_FAIL, 'Unable to open temporary file \''.$v_gzip_temp_name.'\' in binary write mode');
+		  return PclZip::errorCode();
+		}
+	}
+	else
+	{
 		if (($v_file_compressed = @gzopen($v_gzip_temp_name, "wb")) == 0) {
 		  fclose($v_file);
 		  PclZip::privErrorLog(PCLZIP_ERR_WRITE_OPEN_FAIL, 'Unable to open temporary file \''.$v_gzip_temp_name.'\' in binary write mode');
 		  return PclZip::errorCode();
 		}
+	}
 
     // ----- Read the file by PCLZIP_READ_BLOCK_SIZE octets blocks
     $v_size = filesize($p_filename);
@@ -4005,13 +4020,24 @@
     }
 
     // ----- Open the temporary gz file
+	if ($this->bUseGzopen64)
+	{
+		if (($v_src_file = @gzopen64($v_gzip_temp_name, 'rb')) == 0) {
+		  @fclose($v_dest_file);
+		  $p_entry['status'] = "read_error";
+		  PclZip::privErrorLog(PCLZIP_ERR_READ_OPEN_FAIL, 'Unable to open temporary file \''.$v_gzip_temp_name.'\' in binary read mode');
+		  return PclZip::errorCode();
+		}
+	}
+	else
+	{
 		if (($v_src_file = @gzopen($v_gzip_temp_name, 'rb')) == 0) {
 		  @fclose($v_dest_file);
 		  $p_entry['status'] = "read_error";
 		  PclZip::privErrorLog(PCLZIP_ERR_READ_OPEN_FAIL, 'Unable to open temporary file \''.$v_gzip_temp_name.'\' in binary read mode');
 		  return PclZip::errorCode();
 		}
-
+	}
 
     // ----- Read the file by PCLZIP_READ_BLOCK_SIZE octets blocks
     $v_size = $p_entry['size'];

rainloop/v/0.0.0/check.php

@@ -9,7 +9,7 @@
 			'DateTime' => class_exists('DateTime') && class_exists('DateTimeZone'),
 			'libxml' => function_exists('libxml_use_internal_errors'),
 			'dom' => class_exists('DOMDocument'),
-			'Zlib' => function_exists('gzopen'),
+			'Zlib' => function_exists('gzopen') || function_exists('gzopen64'),
 			'PCRE' => function_exists('preg_replace'),
 			'SPL' => function_exists('spl_autoload_register')
 		);