getID3::analyze( string $filename, int $filesize = null, string $original_filename = '', resource $fp = null ): array

668	public function analyze($filename, $filesize=null, $original_filename='', $fp=null) {669		try {670			if (!$this->openfile($filename, $filesize, $fp)) {671				return $this->info;672			}673 674			// Handle tags675			foreach (array('id3v2'=>'id3v2', 'id3v1'=>'id3v1', 'apetag'=>'ape', 'lyrics3'=>'lyrics3') as $tag_name => $tag_key) {676				$option_tag = 'option_tag_'.$tag_name;677				if ($this->$option_tag) {678					$this->include_module('tag.'.$tag_name);679					try {680						$tag_class = 'getid3_'.$tag_name;681						$tag = new $tag_class($this);682						$tag->Analyze();683					}684					catch (getid3_exception $e) {685						throw $e;686					}687				}688			}689			if (isset($this->info['id3v2']['tag_offset_start'])) {690				$this->info['avdataoffset'] = max($this->info['avdataoffset'], $this->info['id3v2']['tag_offset_end']);691			}692			foreach (array('id3v1'=>'id3v1', 'apetag'=>'ape', 'lyrics3'=>'lyrics3') as $tag_name => $tag_key) {693				if (isset($this->info[$tag_key]['tag_offset_start'])) {694					$this->info['avdataend'] = min($this->info['avdataend'], $this->info[$tag_key]['tag_offset_start']);695				}696			}697 698			// ID3v2 detection (NOT parsing), even if ($this->option_tag_id3v2 == false) done to make fileformat easier699			if (!$this->option_tag_id3v2) {700				fseek($this->fp, 0);701				$header = fread($this->fp, 10);702				if ((substr($header, 0, 3) == 'ID3') && (strlen($header) == 10)) {703					$this->info['id3v2']['header']        = true;704					$this->info['id3v2']['majorversion']  = ord($header[3]);705					$this->info['id3v2']['minorversion']  = ord($header[4]);706					$this->info['avdataoffset']          += getid3_lib::BigEndian2Int(substr($header, 6, 4), 1) + 10; // length of ID3v2 tag in 10-byte header doesn't include 10-byte header length707				}708			}709 710			// read 32 kb file data711			fseek($this->fp, $this->info['avdataoffset']);712			$formattest = fread($this->fp, 32774);713 714			// determine format715			$determined_format = $this->GetFileFormat($formattest, ($original_filename ? $original_filename : $filename));716 717			// unable to determine file format718			if (!$determined_format) {719				fclose($this->fp);720				return $this->error('unable to determine file format');721			}722 723			// check for illegal ID3 tags724			if (isset($determined_format['fail_id3']) && (in_array('id3v1', $this->info['tags']) || in_array('id3v2', $this->info['tags']))) {725				if ($determined_format['fail_id3'] === 'ERROR') {726					fclose($this->fp);727					return $this->error('ID3 tags not allowed on this file type.');728				} elseif ($determined_format['fail_id3'] === 'WARNING') {729					$this->warning('ID3 tags not allowed on this file type.');730				}731			}732 733			// check for illegal APE tags734			if (isset($determined_format['fail_ape']) && in_array('ape', $this->info['tags'])) {735				if ($determined_format['fail_ape'] === 'ERROR') {736					fclose($this->fp);737					return $this->error('APE tags not allowed on this file type.');738				} elseif ($determined_format['fail_ape'] === 'WARNING') {739					$this->warning('APE tags not allowed on this file type.');740				}741			}742 743			// set mime type744			$this->info['mime_type'] = $determined_format['mime_type'];745 746			// supported format signature pattern detected, but module deleted747			if (!file_exists(GETID3_INCLUDEPATH.$determined_format['include'])) {