425     public function displaySymbol($text, $high)  argument
430         $text = trim(stripslashes($text));
431         switch ($text) {
458                 $font = $dirFonts . "/" . $fontsMath[$text] . ".ttf";
460                 $text = $symbols[$text];
461                 $tmpDim = imagettfbbox($t, 0, $font, $text);
468                 imagettftext($tmpImg, $t, 0, 0, $tmpHeight, $tmpBlack, $font, $text);
504                 $font = $dirFonts . "/" . $fontsMath[$text] . ".ttf";
506                 $text = $symbols[$text];
507                 $tmpDim = imagettfbbox($t, 0, $font, $text);
514                 imagettftext($tmpImg, $t, 0, 0, $tmpHeight, $tmpBlack, $font, $text);
552             if (isset($fontsMath[$text])) {
553                 $font = $dirFonts . "/" . $fontsMath[$text] . ".ttf";
554             } elseif ($this->isNumber($text)) {
560             if (isset($symbols[$text])) {
561                 $text = $symbols[$text];
564                     $tmpDim = imagettfbbox($t, 0, $font, $text);
573                 imagettftext($tmpImg, $t, 0, 5, $tmpHeight / 2, $tmpBlack, $font, $text);
625                 if (isset($fontsMath[$text])) {
626                     $font = $dirFonts . "/" . $fontsMath[$text] . ".ttf";
627                 } elseif ($this->isNumber($text)) {
633                 if (isset($symbols[$text])) {
634                     $text = $symbols[$text];
637                     $tmpDim = imagettfbbox($t, 0, $font, $text);
646                 imagettftext($tmpImg, $t, 0, 0, $tmpHeight / 4, $tmpBlack, $font, $text);
710     public function displayText($text, $size)  argument
714         $text = stripslashes($text);
716         $textHeight = 'dg' . $text;
718         $widthDim = imagettfbbox($size, 0, $font, $text);
726 …    imagettftext($img, $size, $angle, 0, -min($heightDim[5], $heightDim[7]), $black, $font, $text);
736     public function displayMath($text, $size)  argument
742         $text = stripslashes($text);
743         if (isset($fontsMath[$text])) {
744             $font = $dirFonts . "/" . $fontsMath[$text] . ".ttf";
745         } elseif (preg_match("#[a-zA-Z]#", $text)) {
750         if (isset($symbols[$text])) {
751             $text = $symbols[$text];
753         $textHeight = 'dg' . $text;
755         $widthDim = imagettfbbox($size, 0, $font, $text);
763         imagettftext($img, $size, 0, 0, -min($heightDim[5], $heightDim[7]), $black, $font, $text);