getid3_lib::EmbeddedLookup( string $key, int $begin, int $end, string $file, string $name ): string

1709	public static function EmbeddedLookup($key, $begin, $end, $file, $name) {1710 1711		// Cached1712		static $cache;1713		if (isset($cache[$file][$name])) {1714			return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');1715		}1716 1717		// Init1718		$keylength  = strlen($key);1719		$line_count = $end - $begin - 7;1720 1721		// Open php file1722		$fp = fopen($file, 'r');1723 1724		// Discard $begin lines1725		for ($i = 0; $i < ($begin + 3); $i++) {1726			fgets($fp, 1024);1727		}1728 1729		// Loop thru line1730		while (0 < $line_count--) {1731 1732			// Read line1733			$line = ltrim(fgets($fp, 1024), "\t ");1734 1735			// METHOD A: only cache the matching key - less memory but slower on next lookup of not-previously-looked-up key1736			//$keycheck = substr($line, 0, $keylength);1737			//if ($key == $keycheck)  {1738			//	$cache[$file][$name][$keycheck] = substr($line, $keylength + 1);1739			//	break;1740			//}1741 1742			// METHOD B: cache all keys in this lookup - more memory but faster on next lookup of not-previously-looked-up key1743			//$cache[$file][$name][substr($line, 0, $keylength)] = trim(substr($line, $keylength + 1));1744			$explodedLine = explode("\t", $line, 2);1745			$ThisKey   = $explodedLine[0];1746			$ThisValue = (isset($explodedLine[1]) ? $explodedLine[1] : '');1747			$cache[$file][$name][$ThisKey] = trim($ThisValue);1748		}1749 1750		// Close and return1751		fclose($fp);1752		return (isset($cache[$file][$name][$key]) ? $cache[$file][$name][$key] : '');1753	}