getID3::openfile( string $filename, int $filesize = null, resource $fp = null ): bool

553	public function openfile($filename, $filesize=null, $fp=null) {554		try {555			if (!empty($this->startup_error)) {556				throw new getid3_exception($this->startup_error);557			}558			if (!empty($this->startup_warning)) {559				foreach (explode("\n", $this->startup_warning) as $startup_warning) {560					$this->warning($startup_warning);561				}562			}563 564			// init result array and set parameters565			$this->filename = $filename;566			$this->info = array();567			$this->info['GETID3_VERSION']   = $this->version();568			$this->info['php_memory_limit'] = (($this->memory_limit > 0) ? $this->memory_limit : false);569 570			// remote files not supported571			if (preg_match('#^(ht|f)tps?://#', $filename)) {572				throw new getid3_exception('Remote files are not supported - please copy the file locally first');573			}574 575			$filename = str_replace('/', DIRECTORY_SEPARATOR, $filename);576			//$filename = preg_replace('#(?<!gs:)('.preg_quote(DIRECTORY_SEPARATOR).'{2,})#', DIRECTORY_SEPARATOR, $filename);577 578			// open local file579			//if (is_readable($filename) && is_file($filename) && ($this->fp = fopen($filename, 'rb'))) { // see https://www.getid3.org/phpBB3/viewtopic.php?t=1720580			if (($fp != null) && ((get_resource_type($fp) == 'file') || (get_resource_type($fp) == 'stream'))) {581				$this->fp = $fp;582			} elseif ((is_readable($filename) || file_exists($filename)) && is_file($filename) && ($this->fp = fopen($filename, 'rb'))) {583				// great584			} else {585				$errormessagelist = array();586				if (!is_readable($filename)) {587					$errormessagelist[] = '!is_readable';588				}589				if (!is_file($filename)) {590					$errormessagelist[] = '!is_file';591				}592				if (!file_exists($filename)) {593					$errormessagelist[] = '!file_exists';594				}595				if (empty($errormessagelist)) {596					$errormessagelist[] = 'fopen failed';597				}598				throw new getid3_exception('Could not open "'.$filename.'" ('.implode('; ', $errormessagelist).')');599			}600 601			$this->info['filesize'] = (!is_null($filesize) ? $filesize : filesize($filename));602			// set redundant parameters - might be needed in some include file603			// filenames / filepaths in getID3 are always expressed with forward slashes (unix-style) for both Windows and other to try and minimize confusion604			$filename = str_replace('\\', '/', $filename);605			$this->info['filepath']     = str_replace('\\', '/', realpath(dirname($filename)));606			$this->info['filename']     = getid3_lib::mb_basename($filename);607			$this->info['filenamepath'] = $this->info['filepath'].'/'.$this->info['filename'];608 609			// set more parameters610			$this->info['avdataoffset']        = 0;611			$this->info['avdataend']           = $this->info['filesize'];612			$this->info['fileformat']          = '';                // filled in later613			$this->info['audio']['dataformat'] = '';                // filled in later, unset if not used614			$this->info['video']['dataformat'] = '';                // filled in later, unset if not used615			$this->info['tags']                = array();           // filled in later, unset if not used616			$this->info['error']               = array();           // filled in later, unset if not used617			$this->info['warning']             = array();           // filled in later, unset if not used618			$this->info['comments']            = array();           // filled in later, unset if not used619			$this->info['encoding']            = $this->encoding;   // required by id3v2 and iso modules - can be unset at the end if desired620 621			// option_max_2gb_check622			if ($this->option_max_2gb_check) {623				// PHP (32-bit all, and 64-bit Windows) doesn't support integers larger than 2^31 (~2GB)624				// filesize() simply returns (filesize % (pow(2, 32)), no matter the actual filesize625				// ftell() returns 0 if seeking to the end is beyond the range of unsigned integer626				$fseek = fseek($this->fp, 0, SEEK_END);627				if (($fseek < 0) || (($this->info['filesize'] != 0) && (ftell($this->fp) == 0)) ||628					($this->info['filesize'] < 0) ||629					(ftell($this->fp) < 0)) {630						$real_filesize = getid3_lib::getFileSizeSyscall($this->info['filenamepath']);631 632						if ($real_filesize === false) {
When	Instructions	Calls it makes
`!empty($value)`	11	none
`empty($value) && $filename`	29–30	`->version()`
`$filename`	36–38	`explode(), ->version()`
`empty($value) && !$filename && $fp == false && is_readable() && !is_file()`	62–71	`->version(), is_readable(), is_file(), is_readable(), is_file(), file_exists()`
`empty($value) && !$filename && $fp == false && !is_readable() && !file_exists()`	62–71	`->version(), is_readable(), file_exists(), is_readable(), is_file(), file_exists()`
`empty($value) && !$filename && $fp == false && !is_readable() && file_exists() && !is_file()`	66–75	`->version(), is_readable(), file_exists(), is_file(), is_readable(), is_file(), file_exists()`
`empty($value) && !$filename && $fp == false && is_readable() && is_file()`	69–78	`->version(), is_readable(), is_file(), fopen(), is_readable(), is_file(), file_exists()`
`!$filename && $fp == false && is_readable() && !is_file()`	69–79	`explode(), ->version(), is_readable(), is_file(), is_readable(), is_file(), file_exists()`
`!$filename && $fp == false && !is_readable() && !file_exists()`	69–79	`explode(), ->version(), is_readable(), file_exists(), is_readable(), is_file(), file_exists()`
`empty($value) && !$filename && $fp != false && is_readable() && !is_file()`	72–81	`->version(), get_resource_type(), get_resource_type(), is_readable(), is_file(), is_readable(), is_file(), file_exists()`
`empty($value) && !$filename && $fp != false && !is_readable() && !file_exists()`	72–81	`->version(), get_resource_type(), get_resource_type(), is_readable(), file_exists(), is_readable(), is_file(), file_exists()`
`empty($value) && !$filename && $fp == false && !is_readable() && file_exists() && is_file()`	73–82	`->version(), is_readable(), file_exists(), is_file(), fopen(), is_readable(), is_file(), file_exists()`
PHP	Compiled	Executed	Branches	Notes
8.6-dev	297	11–204	26	1 fewer instruction than PHP 8.5
8.5	298	11–205	26
8.4	298	11–205	26	17 fewer instructions than PHP 8.3
8.3	315	11–219	26
8.2	315	11–219	26
8.1	315	11–219	26	1 fewer instruction than PHP 7.4
7.4	316	11–220	26