diff --git a/src/wp-includes/ID3/getid3.lib.php b/src/wp-includes/ID3/getid3.lib.php
index 8514e9781f..c409e8c9ac 100644
--- a/src/wp-includes/ID3/getid3.lib.php
+++ b/src/wp-includes/ID3/getid3.lib.php
@@ -427,6 +427,7 @@ class getid3_lib
 	 * @return string
 	 */
 	public static function Dec2Bin($number) {
+		$bytes = array(); // Prevent undefined Array Error
 		while ($number >= 256) {
 			$bytes[] = (($number / 256) - (floor($number / 256))) * 256;
 			$number = floor($number / 256);
@@ -664,7 +665,8 @@ class getid3_lib
 		//   $foo = array('path'=>array('to'=>'array('my'=>array('file.txt'))));
 		// or
 		//   $foo['path']['to']['my'] = 'file.txt';
-		$ArrayPath = ltrim($ArrayPath, $Separator);
+		$ArrayPath     = ltrim($ArrayPath, $Separator);
+		$ReturnedArray = array(); // Prevent undefined Array Error
 		if (($pos = strpos($ArrayPath, $Separator)) !== false) {
 			$ReturnedArray[substr($ArrayPath, 0, $pos)] = self::CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value);
 		} else {
@@ -1734,7 +1736,8 @@ class getid3_lib
 	 * @return float|bool
 	 */
 	public static function getFileSizeSyscall($path) {
-		$filesize = false;
+		$filesize    = false;
+		$commandline = null; // Prevent undefined variable Error
 
 		if (GETID3_OS_ISWINDOWS) {
 			if (class_exists('COM')) { // From PHP 5.3.15 and 5.4.5, COM and DOTNET is no longer built into the php core.you have to add COM support in php.ini:
diff --git a/src/wp-includes/ID3/getid3.php b/src/wp-includes/ID3/getid3.php
index 5cb3c036c0..424a7fb36e 100644
--- a/src/wp-includes/ID3/getid3.php
+++ b/src/wp-includes/ID3/getid3.php
@@ -2224,6 +2224,9 @@ abstract class getid3_handler
 	 * @throws getid3_exception
 	 */
 	public function saveAttachment($name, $offset, $length, $image_mime=null) {
+		$fp_dest = null; // Prevent undefined variable Error
+		$dest 	 = null; // Prevent undefined variable Error
+
 		try {
 
 			// do not extract at all
diff --git a/src/wp-includes/ID3/module.audio-video.asf.php b/src/wp-includes/ID3/module.audio-video.asf.php
index fce923c027..679fde6b30 100644
--- a/src/wp-includes/ID3/module.audio-video.asf.php
+++ b/src/wp-includes/ID3/module.audio-video.asf.php
@@ -93,6 +93,7 @@ class getid3_asf extends getid3_handler
 		$offset = 0;
 		$thisfile_asf_streambitratepropertiesobject = array();
 		$thisfile_asf_codeclistobject = array();
+		$StreamPropertiesObjectData = array(); // Prevent undefined Array Error
 
 		for ($HeaderObjectsCounter = 0; $HeaderObjectsCounter < $thisfile_asf_headerobject['headerobjects']; $HeaderObjectsCounter++) {
 			$NextObjectGUID = substr($ASFHeaderData, $offset, 16);
diff --git a/src/wp-includes/ID3/module.audio-video.flv.php b/src/wp-includes/ID3/module.audio-video.flv.php
index 7e684072e3..07c8681e86 100644
--- a/src/wp-includes/ID3/module.audio-video.flv.php
+++ b/src/wp-includes/ID3/module.audio-video.flv.php
@@ -161,6 +161,7 @@ class getid3_flv extends getid3_handler
 						$info['flv']['video']['videoCodec'] = $LastHeaderByte & 0x07;
 
 						$FLVvideoHeader = $this->fread(11);
+						$PictureSizeEnc = array(); // Prevent undefined Array Error
 
 						if ($info['flv']['video']['videoCodec'] == GETID3_FLV_VIDEO_H264) {
 							// this code block contributed by: moysevichØgmail*com
diff --git a/src/wp-includes/ID3/module.audio-video.matroska.php b/src/wp-includes/ID3/module.audio-video.matroska.php
index a285108590..128e614e2c 100644
--- a/src/wp-includes/ID3/module.audio-video.matroska.php
+++ b/src/wp-includes/ID3/module.audio-video.matroska.php
@@ -224,14 +224,14 @@ class getid3_matroska extends getid3_handler
 	 *
 	 * @var bool
 	 */
-	public static $hide_clusters    = true;
+	public $hide_clusters    = true;
 
 	/**
 	 * True to parse the whole file, not only header [default: FALSE].
 	 *
 	 * @var bool
 	 */
-	public static $parse_whole_file = false;
+	public $parse_whole_file = false;
 
 	/*
 	 * Private parser settings/placeholders.
@@ -586,7 +586,7 @@ class getid3_matroska extends getid3_handler
 					$info['matroska']['segment'][0]['length'] = $top_element['length'];
 
 					while ($this->getEBMLelement($element_data, $top_element['end'])) {
-						if ($element_data['id'] != EBML_ID_CLUSTER || !self::$hide_clusters) { // collect clusters only if required
+						if ($element_data['id'] != EBML_ID_CLUSTER || !$this->hide_clusters) { // collect clusters only if required
 							$info['matroska']['segments'][] = $element_data;
 						}
 						switch ($element_data['id']) {
@@ -618,7 +618,7 @@ class getid3_matroska extends getid3_handler
 												$this->warning('seek_entry[target_id] unexpectedly not set at '.$seek_entry['offset']);
 												break;
 											}
-											if (($seek_entry['target_id'] != EBML_ID_CLUSTER) || !self::$hide_clusters) { // collect clusters only if required
+											if (($seek_entry['target_id'] != EBML_ID_CLUSTER) || !$this->hide_clusters) { // collect clusters only if required
 												$info['matroska']['seek'][] = $seek_entry;
 											}
 											break;
@@ -905,7 +905,7 @@ class getid3_matroska extends getid3_handler
 								break;
 
 							case EBML_ID_CUES: // A top-level element to speed seeking access. All entries are local to the segment. Should be mandatory for non "live" streams.
-								if (self::$hide_clusters) { // do not parse cues if hide clusters is "ON" till they point to clusters anyway
+								if ($this->hide_clusters) { // do not parse cues if hide clusters is "ON" till they point to clusters anyway
 									$this->current_offset = $element_data['end'];
 									break;
 								}
@@ -1246,12 +1246,12 @@ class getid3_matroska extends getid3_handler
 									}
 									$this->current_offset = $subelement['end'];
 								}
-								if (!self::$hide_clusters) {
+								if (!$this->hide_clusters) {
 									$info['matroska']['cluster'][] = $cluster_entry;
 								}
 
 								// check to see if all the data we need exists already, if so, break out of the loop
-								if (!self::$parse_whole_file) {
+								if (!$this->parse_whole_file) {
 									if (isset($info['matroska']['info']) && is_array($info['matroska']['info'])) {
 										if (isset($info['matroska']['tracks']['tracks']) && is_array($info['matroska']['tracks']['tracks'])) {
 											if (count($info['matroska']['track_data_offsets']) == count($info['matroska']['tracks']['tracks'])) {
diff --git a/src/wp-includes/ID3/module.audio-video.quicktime.php b/src/wp-includes/ID3/module.audio-video.quicktime.php
index 1cf1c0590b..bada8fa0fd 100644
--- a/src/wp-includes/ID3/module.audio-video.quicktime.php
+++ b/src/wp-includes/ID3/module.audio-video.quicktime.php
@@ -23,8 +23,18 @@ getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE_
 
 class getid3_quicktime extends getid3_handler
 {
-
+	/** audio-video.quicktime
+	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata
+	 *
+	 * @var bool
+	 */
 	public $ReturnAtomData        = true;
+	
+	/** audio-video.quicktime
+	 * return all parsed data from all atoms if true, otherwise just returned parsed metadata
+	 *
+	 * @var bool
+	 */
 	public $ParseAllPossibleAtoms = false;
 
 	/**
@@ -728,11 +738,13 @@ class getid3_quicktime extends getid3_handler
 					$atom_structure['flags']['play_on_open'] = (bool) $atom_structure['play_on_open_flag'];
 					$atom_structure['flags']['slide_show']   = (bool) $atom_structure['slide_show_flag'];
 
-					$ptv_lookup[0] = 'normal';
-					$ptv_lookup[1] = 'double';
-					$ptv_lookup[2] = 'half';
-					$ptv_lookup[3] = 'full';
-					$ptv_lookup[4] = 'current';
+					$ptv_lookup = array(
+						0 => 'normal',
+						1 => 'double',
+						2 => 'half',
+						3 => 'full',
+						4 => 'current'
+					);
 					if (isset($ptv_lookup[$atom_structure['display_size_raw']])) {
 						$atom_structure['display_size'] = $ptv_lookup[$atom_structure['display_size_raw']];
 					} else {
@@ -1721,6 +1733,7 @@ $this->warning('incomplete/incorrect handling of "stsd" with Parrot metadata in
 									'unknown_data'   => array(),
 									'debug_list'     => '',      // Used to debug variables stored as comma delimited strings
 							);
+							$debug_structure = array();
 							$debug_structure['debug_items'] = array();
 							// Can start loop here to decode all sensor data in 32 Byte chunks:
 							foreach (str_split($atom_SENSOR_data, 32) as $sensor_key => $sensor_data) {
diff --git a/src/wp-includes/ID3/module.audio-video.riff.php b/src/wp-includes/ID3/module.audio-video.riff.php
index cdf553386b..fbc180c4f5 100644
--- a/src/wp-includes/ID3/module.audio-video.riff.php
+++ b/src/wp-includes/ID3/module.audio-video.riff.php
@@ -56,6 +56,7 @@ class getid3_riff extends getid3_handler
 		$thisfile_riff_video       = &$thisfile_riff['video'];
 		$thisfile_riff_WAVE        = array();
 
+		$Original 				  = array();
 		$Original['avdataoffset'] = $info['avdataoffset'];
 		$Original['avdataend']    = $info['avdataend'];
 
@@ -307,6 +308,7 @@ class getid3_riff extends getid3_handler
 					$thisfile_riff_WAVE_bext_0['coding_history'] =         explode("\r\n", trim(substr($thisfile_riff_WAVE_bext_0['data'], 601)));
 					if (preg_match('#^([0-9]{4}).([0-9]{2}).([0-9]{2})$#', $thisfile_riff_WAVE_bext_0['origin_date'], $matches_bext_date)) {
 						if (preg_match('#^([0-9]{2}).([0-9]{2}).([0-9]{2})$#', $thisfile_riff_WAVE_bext_0['origin_time'], $matches_bext_time)) {
+							$bext_timestamp = array();
 							list($dummy, $bext_timestamp['year'], $bext_timestamp['month'],  $bext_timestamp['day'])    = $matches_bext_date;
 							list($dummy, $bext_timestamp['hour'], $bext_timestamp['minute'], $bext_timestamp['second']) = $matches_bext_time;
 							$thisfile_riff_WAVE_bext_0['origin_date_unix'] = gmmktime($bext_timestamp['hour'], $bext_timestamp['minute'], $bext_timestamp['second'], $bext_timestamp['month'], $bext_timestamp['day'], $bext_timestamp['year']);
@@ -733,6 +735,7 @@ class getid3_riff extends getid3_handler
 				}
 				if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strh'][0]['data'])) {
 					if (is_array($thisfile_riff['AVI ']['hdrl']['strl']['strh'])) {
+						$thisfile_riff_raw_strf_strhfccType_streamindex = null;
 						for ($i = 0; $i < count($thisfile_riff['AVI ']['hdrl']['strl']['strh']); $i++) {
 							if (isset($thisfile_riff['AVI ']['hdrl']['strl']['strh'][$i]['data'])) {
 								$strhData = $thisfile_riff['AVI ']['hdrl']['strl']['strh'][$i]['data'];
@@ -1514,6 +1517,8 @@ class getid3_riff extends getid3_handler
 
 		$RIFFchunk = false;
 		$FoundAllChunksWeNeed = false;
+		$LISTchunkParent = null;
+		$LISTchunkMaxOffset = null;
 
 		try {
 			$this->fseek($startoffset);
@@ -2076,6 +2081,7 @@ class getid3_riff extends getid3_handler
 	 */
 	public static function ParseBITMAPINFOHEADER($BITMAPINFOHEADER, $littleEndian=true) {
 
+		$parsed					   = array();
 		$parsed['biSize']          = substr($BITMAPINFOHEADER,  0, 4); // number of bytes required by the BITMAPINFOHEADER structure
 		$parsed['biWidth']         = substr($BITMAPINFOHEADER,  4, 4); // width of the bitmap in pixels
 		$parsed['biHeight']        = substr($BITMAPINFOHEADER,  8, 4); // height of the bitmap in pixels. If biHeight is positive, the bitmap is a 'bottom-up' DIB and its origin is the lower left corner. If biHeight is negative, the bitmap is a 'top-down' DIB and its origin is the upper left corner
diff --git a/src/wp-includes/ID3/module.audio.flac.php b/src/wp-includes/ID3/module.audio.flac.php
index 1cea4364c2..4680099f94 100644
--- a/src/wp-includes/ID3/module.audio.flac.php
+++ b/src/wp-includes/ID3/module.audio.flac.php
@@ -402,6 +402,7 @@ class getid3_flac extends getid3_handler
 	public function parsePICTURE() {
 		$info = &$this->getid3->info;
 
+		$picture 				   = array(); // Prevent undefined Array Error
 		$picture['typeid']         = getid3_lib::BigEndian2Int($this->fread(4));
 		$picture['picturetype']    = self::pictureTypeLookup($picture['typeid']);
 		$picture['image_mime']     = $this->fread(getid3_lib::BigEndian2Int($this->fread(4)));
diff --git a/src/wp-includes/ID3/module.audio.mp3.php b/src/wp-includes/ID3/module.audio.mp3.php
index 26b28068f8..884a6d9bdd 100644
--- a/src/wp-includes/ID3/module.audio.mp3.php
+++ b/src/wp-includes/ID3/module.audio.mp3.php
@@ -55,6 +55,7 @@ class getid3_mp3 extends getid3_handler
 			$info['audio']['bitrate_mode'] = strtolower($info['mpeg']['audio']['bitrate_mode']);
 		}
 
+		$CurrentDataLAMEversionString = null;
 		if (((isset($info['id3v2']['headerlength']) && ($info['avdataoffset'] > $info['id3v2']['headerlength'])) || (!isset($info['id3v2']) && ($info['avdataoffset'] > 0) && ($info['avdataoffset'] != $initialOffset)))) {
 
 			$synchoffsetwarning = 'Unknown data before synch ';
@@ -1273,6 +1274,7 @@ class getid3_mp3 extends getid3_handler
 		$LongMPEGbitrateLookup        = array();
 		$LongMPEGpaddingLookup        = array();
 		$LongMPEGfrequencyLookup      = array();
+		$Distribution 				  = array();
 		$Distribution['bitrate']      = array();
 		$Distribution['frequency']    = array();
 		$Distribution['layer']        = array();
@@ -1558,6 +1560,7 @@ class getid3_mp3 extends getid3_handler
 						$pct_data_scanned = 0;
 						for ($current_segment = 0; $current_segment < $max_scan_segments; $current_segment++) {
 							$frames_scanned_this_segment = 0;
+							$scan_start_offset = array();
 							if ($this->ftell() >= $info['avdataend']) {
 								break;
 							}
@@ -1887,6 +1890,7 @@ class getid3_mp3 extends getid3_handler
 			return false;
 		}
 
+		$MPEGrawHeader					= array();
 		$MPEGrawHeader['synch']         = (getid3_lib::BigEndian2Int(substr($Header4Bytes, 0, 2)) & 0xFFE0) >> 4;
 		$MPEGrawHeader['version']       = (ord($Header4Bytes[1]) & 0x18) >> 3; //    BB
 		$MPEGrawHeader['layer']         = (ord($Header4Bytes[1]) & 0x06) >> 1; //      CC
diff --git a/src/wp-includes/ID3/module.audio.ogg.php b/src/wp-includes/ID3/module.audio.ogg.php
index fe092d9d94..47c10c392c 100644
--- a/src/wp-includes/ID3/module.audio.ogg.php
+++ b/src/wp-includes/ID3/module.audio.ogg.php
@@ -529,6 +529,7 @@ class getid3_ogg extends getid3_handler
 	 */
 	public function ParseOggPageHeader() {
 		// http://xiph.org/ogg/vorbis/doc/framing.html
+		$oggheader = array();
 		$oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file
 
 		$filedata = $this->fread($this->getid3->fread_buffer_size());
diff --git a/src/wp-includes/ID3/module.tag.apetag.php b/src/wp-includes/ID3/module.tag.apetag.php
index 26be982c73..040d457c5d 100644
--- a/src/wp-includes/ID3/module.tag.apetag.php
+++ b/src/wp-includes/ID3/module.tag.apetag.php
@@ -360,6 +360,7 @@ class getid3_apetag extends getid3_handler
 		// http://www.uni-jena.de/~pfk/mpp/sv8/apeheader.html
 
 		// shortcut
+		$headerfooterinfo 		 = array();
 		$headerfooterinfo['raw'] = array();
 		$headerfooterinfo_raw = &$headerfooterinfo['raw'];
 
@@ -389,6 +390,7 @@ class getid3_apetag extends getid3_handler
 		// "Note: APE Tags 1.0 do not use any of the APE Tag flags.
 		// All are set to zero on creation and ignored on reading."
 		// http://wiki.hydrogenaud.io/index.php?title=Ape_Tags_Flags
+		$flags 						= array();
 		$flags['header']            = (bool) ($rawflagint & 0x80000000);
 		$flags['footer']            = (bool) ($rawflagint & 0x40000000);
 		$flags['this_is_header']    = (bool) ($rawflagint & 0x20000000);
diff --git a/src/wp-includes/ID3/module.tag.id3v1.php b/src/wp-includes/ID3/module.tag.id3v1.php
index 16dcf253b6..144c9a8374 100644
--- a/src/wp-includes/ID3/module.tag.id3v1.php
+++ b/src/wp-includes/ID3/module.tag.id3v1.php
@@ -39,6 +39,7 @@ class getid3_id3v1 extends getid3_handler
 
 			$info['avdataend'] = $info['filesize'] - 128;
 
+			$ParsedID3v1 			= array();
 			$ParsedID3v1['title']   = $this->cutfield(substr($id3v1tag,   3, 30));
 			$ParsedID3v1['artist']  = $this->cutfield(substr($id3v1tag,  33, 30));
 			$ParsedID3v1['album']   = $this->cutfield(substr($id3v1tag,  63, 30));
diff --git a/src/wp-includes/ID3/module.tag.id3v2.php b/src/wp-includes/ID3/module.tag.id3v2.php
index 85dd7a147a..5769e2e90f 100644
--- a/src/wp-includes/ID3/module.tag.id3v2.php
+++ b/src/wp-includes/ID3/module.tag.id3v2.php
@@ -345,7 +345,7 @@ class getid3_id3v2 extends getid3_handler
 				}
 				if (($frame_size <= strlen($framedata)) && ($this->IsValidID3v2FrameName($frame_name, $id3v2_majorversion))) {
 
-					unset($parsedFrame);
+					$parsedFrame 					= array();
 					$parsedFrame['frame_name']      = $frame_name;
 					$parsedFrame['frame_flags_raw'] = $frame_flags;
 					$parsedFrame['data']            = substr($framedata, 0, $frame_size);
@@ -1369,7 +1369,8 @@ class getid3_id3v2 extends getid3_handler
 				$this->warning('Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding');
 				$frame_textencoding_terminator = "\x00";
 			}
-
+			$frame_imagetype = null;
+			$frame_mimetype = null;
 			if ($id3v2_majorversion == 2 && strlen($parsedFrame['data']) > $frame_offset) {
 				$frame_imagetype = substr($parsedFrame['data'], $frame_offset, 3);
 				if (strtolower($frame_imagetype) == 'ima') {
diff --git a/src/wp-includes/ID3/module.tag.lyrics3.php b/src/wp-includes/ID3/module.tag.lyrics3.php
index b2375057e7..c8b2cf6305 100644
--- a/src/wp-includes/ID3/module.tag.lyrics3.php
+++ b/src/wp-includes/ID3/module.tag.lyrics3.php
@@ -33,6 +33,9 @@ class getid3_lyrics3 extends getid3_handler
 		}
 
 		$this->fseek((0 - 128 - 9 - 6), SEEK_END);          // end - ID3v1 - "LYRICSEND" - [Lyrics3size]
+		$lyrics3offset = null;
+		$lyrics3version = null;
+		$lyrics3size   = null;
 		$lyrics3_id3v1 = $this->fread(128 + 9 + 6);
 		$lyrics3lsz    = (int) substr($lyrics3_id3v1, 0, 6); // Lyrics3size
 		$lyrics3end    = substr($lyrics3_id3v1,  6,   9); // LYRICSEND or LYRICS200