Getting the Name of a Font from a TTF, OTF File

Font files such as TTF and OTF have metadata embedded in them with information such as the font’s name, what font family it belongs to and so forth. I wrote a PHP class that provides the ability to grab this information from any TTF and OTF file. I’ve tested it on many different fonts and it’s working surprisingly well.

Example Usage

$objFontInfo = new FontInfo( "path/to/font.ttf" );
print $objFontInfo->getFontName();

Here is the code for the class. A lot of credit goes to this answer provided on StackOverflow. I rewrote the majority of the class, simplifying it and using Hungarian notation (the way to go in PHP!). If you’re not a fan of Hungarian notation, then just grab code from the StackOverflow answer.

FontInfo.class

<?php

	/**
	 * @class
	 * Retrieves information such as the proper name from a font TTF or OTF font file.
	 * @source http://stackoverflow.com/questions/5668901/php-how-to-read-title-of-font-from-ttf-file
	 */
	class FontInfo {

		/**
		 * Contains information in the TTF 'name' table.
		 */
		private $_arrInfo = null;

		/**
		 * Constructor.
		 * @param strFontPath Path to the font file.
		 */
		function __construct( $strFontPath ) {
			$this->_arrInfo = $this->getFontInfo( $strFontPath );
		}

		/**
		 * Gets the information about the font at the specified path.
		 * @param strFontPath
		 * @return
		 */
		private function getFontInfo( $strFontPath ) {
			// Open the file and read its contents.
			$obintJFile = fopen( $strFontPath, "r" );
			$strText = fread( $obintJFile, filesize( $strFontPath ) );
			fclose( $obintJFile );

			// Grab information.
			$intNumberOfTables = hexdec( $this->dec2ord( $strText[4] ) . $this->dec2ord( $strText[5] ) ); 
			for( $intI = 0; $intI < $intNumberOfTables; $intI++ ) { 
				$strTag = $strText[ 12 + $intI * 16 ] . $strText[ 12 + $intI * 16 + 1 ] . $strText[ 12 + $intI * 16 + 2 ] . $strText[ 12 + $intI * 16 + 3 ];

				if( $strTag == "name" ) { 
					$intOffset = hexdec( 
						$this->dec2ord( $strText[ 12 + $intI * 16 + 8 ] ) . $this->dec2ord( $strText[ 12 + $intI * 16 + 8 + 1 ] ) . 
						$this->dec2ord( $strText[ 12 + $intI * 16 + 8 + 2 ] ) . $this->dec2ord( $strText[ 12 + $intI * 16 + 8 + 3 ] )
					);
					$intOffsetStorage = hexdec( $this->dec2ord( $strText[ $intOffset + 4 ] ) . $this->dec2ord( $strText[ $intOffset + 5 ] ) ); 
					$intNumberOfNameRecords = hexdec( $this->dec2ord( $strText[ $intOffset + 2 ] ) . $this->dec2ord( $strText[ $intOffset + 3 ] ) ); 
				} 
			}

			$intStorageDecimal = $intOffsetStorage + $intOffset; 
			$strStorageHexadecimal = strtoupper( dechex( $intStorageDecimal ) ); 

			for( $intJ = 0; $intJ < $intNumberOfNameRecords; $intJ++ ) { 
				//$platform_id_dec = hexdec( $this->dec2ord( $this->text[$this->ntOffset+6+$intJ*12+0]).$this->dec2ord( $this->text[$this->ntOffset+6+$intJ*12+1])); 
				$intNameId = hexdec( $this->dec2ord( $strText[ $intOffset + 6 + $intJ * 12 + 6 ] ) . $this->dec2ord( $strText[ $intOffset + 6 + $intJ * 12 + 7 ] ) ); 
				$intStringLength = hexdec( $this->dec2ord( $strText[ $intOffset + 6 + $intJ * 12 + 8 ] ) . $this->dec2ord( $strText[ $intOffset + 6 + $intJ * 12 + 9 ] ) ); 
				$intStringOffset = hexdec( $this->dec2ord( $strText[ $intOffset + 6 + $intJ * 12 + 10 ] ) . $this->dec2ord( $strText[ $intOffset + 6 + $intJ * 12 + 11 ] ) ); 

				if( !empty( $intNameId ) && empty( $arrFontTags[ $intNameId ] ) ) { 
					for( $intL = 0; $intL < $intStringLength; $intL++ ) { 
						if( ord( $strText[ $intStorageDecimal + $intStringOffset + $intL ] ) == "0") { 
							continue; 
						} else { 
							$arrFontTags[ $intNameId ] .= $strText[ $intStorageDecimal + $intStringOffset + $intL ]; 
						} 
					} 
				} 
			}

			return $arrFontTags;
		}

		/**
		 * Converts decimal to hex using the ascii value.
		 * @param intDecimal
		 * @return
		 */
		protected function dec2ord( $intDecimal ) { 
			return $this->dec2hex( ord( $intDecimal ) ); 
		}

		/**
		 * Performs hexadecimal to decimal conversion with proper padding.
		 * @param intDecimal
		 * @return
		 */
		protected function dec2hex( $intDecimal ) { 
			return str_repeat( "0", 2 - strlen( ( $strHexadecimal = strtoupper( dechex( $intDecimal ) ) ) ) ) . $strHexadecimal; 
		}

		/**
		 * Gets the copyright.
		 * @return
		 */
		public function getCopyright() {
			return $this->_arrInfo[0];
		}

		/**
		 * Gets the font family.
		 * @return
		 */
		public function getFontFamily() {
			return $this->_arrInfo[1];
		}

		/**
		 * Gets the sub font family.
		 * @return
		 */
		public function getFontSubFamily() {
			return $this->_arrInfo[2];
		}

		/**
		 * Gets the font id.
		 * @return
		 */
		public function getFontId() {
			return $this->_arrInfo[3];
		}

		/**
		 * Gets the font name.
		 * @return
		 */
		public function getFontName() {
			return $this->_arrInfo[4];
		}

	}

Good luck!