Call to undefined function: imagettfbbox()

<?php
//include "vsys.php";
//include "gifmerge.php";
$tmp_save_prefix="";
$anim_size["h"]=50;
$anim_size["w"]=350;
/*if ($cgi["first_image2"]) {
 $fname= "fronts/".$cgi['first_image2'];
 $fname_real=$cgi['first_image2'];
}else{
 //$fname= $_FILES['first_image']['tmp_name'];
 $fname_real= $_FILES['first_image']['name'];
 //$fname="tmp/".time()."_".$fname_real;
 $fname=time()."_".$fname_real;
 move_uploaded_file($_FILES['first_image']['tmp_name'], $fname);
}
if ($cgi["second_image2"]){
 $fname2= "backs/".$cgi['second_image2'];
 $fname2_real=$cgi['second_image2'];
}else{
 $fname2_real= $_FILES['second_image']['name'];
 //$fname2="tmp/".time()."_".$fname2_real;
 $fname2=time()."_".$fname2_real;
 move_uploaded_file($_FILES['second_image']['tmp_name'], $fname2);
 //$fname2= $_FILES['second_image']['tmp_name'];
 
}
*/

//if (!$fname){vMessage("You should choose first image.");exit;}
//if (!$fname2){vMessage("You should choose second image.");exit;}
//$cgi['first_delay']=100;
//if (!$cgi['first_delay']){vMessage("You should choose delay for the first image.");exit;}
//if (!$cgi['second_delay']){vMessage("You should choose delay for the second image.");exit;}
session_start();
if ($_SESSION['number1']){
 $txt=$_SESSION['number1'];
}else{
switch ($_SESSION['number']){
 case 1: $num='B-i-R';break;
 case 2: $num='i-K-i';break;
 case 3: $num='U-C';break;
 case 4: $num='D-O-R-T';break;
 case 5: $num='B-E-S';break;
 case 6: $num='A-L-T-I';break;
 case 7: $num='Y-E-D-i';break;
 case 8: $num='S-E-K-i-Z';break;
 case 9: $num='D-O-K-U-Z';break;
 case 10: $num='O-N';break;
 case 11: $num='O-N-B-i-R';break;
 case 12: $num='O-N-i-K-i';break;
 case 13: $num='O-N-U-C';break;
 case 14: $num='O-N-D-O-R-T';break;
 case 15: $num='O-N-B-E-S';break;
 default: $num=$_SESSION['number'];
 
}
//$num='o-n-e';
$first=chr(rand(0x21,0x40));
$last=chr(rand(0x21,0x40));
$txt=$first.'-'.$num.'-'.$last;
}
vMakeImg($txt);
//vMakeImg($fname2,$fname2_real,"second");
//vMakeAnimGif();
exit;

function  vMakeImg($n){
 global $anim_size;
 $img=imagecreatetruecolor($anim_size["w"],$anim_size["h"]);
 $iconf['bgcolor']='00,00,255'; //$cgi[$n.'_backcolor'];
 $iconf['font']='fonts/arialbd.ttf';
 $iconf['text1']=$n;
 //$iconf['text2']=$cgi[$n.'_text2'];
 //$iconf['text3']=$cgi[$n.'_text3'];
 $iconf['textcolor']='255,255,255';//$cgi[$n.'_textcolor'];
 $iconf['textsize']=27;//$cgi[$n.'_size'];
 //if ($iconf['font'])
  vText($img,$iconf['font'],$iconf['text1'],$iconf['text2'],$iconf['text3'],$iconf['textcolor'],$anim_size["h"],$anim_size["w"],$iconf['textsize']);
 
 //while (imagecolorstotal($img)<256){
    //imagecolorallocate ($img,0,0,0);
 //}
 //Ending
 
 //$tmp_save_file=($tmp_save_prefix)?$tmp_save_prefix:"tmp/".time()."_".rand(100,999);
 //$tmp_save_file=($tmp_save_prefix)?$tmp_save_prefix:time()."_".rand(100,999);
 //if (!$tmp_save_prefix)$tmp_save_prefix=$tmp_save_file;
 //$tmp_save_file.="_$n.gif";
 
 //********************************************************************************Uncoment
 //echo $cgi['path'].$tmp_save_file."==";
 //imagegif ($img,$cgi['path'].$tmp_save_file);
 //imagegif ($img,$tmp_save_file);
 //********************************************************************************Comment
 //imagegif ($img,$n.".gif");
 //echo $tmp_save_file."111";
 //echo "hi";
 //imagepng ($img);
 imagejpeg($img);
 //imagepng ($img,$n.".png");
 

}
function vMakeAnimGif(){
 global $cgi,$tmp_save_prefix;
 
 $animPath=$tmp_save_prefix."_all.gif";
 $filePath1=$tmp_save_prefix."_first.gif";
 $filePath2=$tmp_save_prefix."_second.gif";
 
 $inFiles[0]=$filePath1;
 $inFiles[1]=$filePath2;
 //echo "doing....<br>";
 
 //vMergeToGif("out.gif",$inFiles,20,99999,2);
 
 vMergeToGif($animPath,$inFiles,$cgi['first_delay'],99999);//,-1,$cgi['first_delay']);
 //echo "done.";
 //$str="whirlgif -o $animPath -loop -time {$cgi['first_delay']} $filePath1 -time {$cgi['second_delay']} $filePath2";
 //echo $str;
 //system($str);
 
 
 //********************************************************************************Uncomment
 //unlink($filePath1);
 //********************************************************************************Uncomment
 //unlink($filePath2);
 //********************************************************************************Uncomment
 //echo "<script>document.location='{$animPath}';</script><a href='{$animPath}'>download</a>";
 //aim:BuddyIcon?src=http://dollisland.com imagename.gif
 //echo "--";
 echo "<table width=100% height=100% ><tr><td valign=middle align=center><a href=aim:BuddyIcon?src=http://dollisland.com/gif/$animPath ><img src='$animPath' border=0></a></td></tr></table>";
 //echo "++";
 vTrash();
 
}

function LoadJpeg ($imgname,$imgtype) {
 //echo $imgtype."--";
 if ($imgtype==2){
  $im = @imagecreatefromjpeg ($imgname);//  Attempt to open
 }elseif($imgtype==1){
  $im = @imagecreatefromgif ($imgname);//  Attempt to open
 }elseif($imgtype==3){
  $im = @imagecreatefrompng ($imgname);//  Attempt to open
 }elseif($imgtype==4){
  echo $imgname;
  $im = @imagecreatefromwbmp ($imgname);//  Attempt to open
 }
 else{ $imgtype=2;}
 
 if (!$im) { // See if it failed
  //$im  = imagecreatetruecolor (150, 30); // Create a blank image
  $im  = imagecreate (150, 30); // Create a blank image
  $bgc = imagecolorallocate ($im, 255, 255, 255);
  $tc  = imagecolorallocate ($im, 0, 0, 0);
  imagefilledrectangle ($im, 0, 0, 150, 30, $bgc);
  // Output an errmsg
  imagestring ($im, 1, 5, 5, "Error loading $imgname", $tc);
 }
 
 return $im;
}
function vMessage($str){
 echo "<table height=100% width=100%><tr><td align=center valign=middle>$str";
}
function vBasename ($str){
 $strA=split("[\]",$str);
 $str1=$strA[count($strA)-1];
 $strA=split("[/]",$str1);
 $str1=$strA[count($strA)-1];
 return $str1;
}
function vExtType($str){
 $tnameA=split("\.",$str);
 $t_ext=$tnameA[count ($tnameA)-1];
 $t_ext=strtolower($t_ext);
 if ($t_ext=="gif"){$imgtype=1;}
 elseif (($t_ext=="jpg")||($t_ext=="jpeg")){$imgtype=2;}
 elseif ($t_ext=="png"){$imgtype=3;}
 elseif ($t_ext=="bmp"){$imgtype=4;}
 else {$imgtype=0;}
 //echo $imgtype."#;#";
 return $imgtype;
}
 
function vTrash(){
 global $cgi;
 if ($dir = @opendir($cgi['path'])) {
  while (($file = readdir($dir)) !== false) {
   if ( ($file!='.')&&($file!='..')){
    //echo $file;
    $tnameA=split("_",$file);
    if (count ($tnameA)>1){
     $time1=$tnameA[0];
     $time2=time();
     if (($time2-$time1)>180)unlink($file);
    }
   }
  }
  closedir($dir);
 }
 exit;
}
function getTXTSize($font,$text,$koef,$max_height,$width){
 
 $TXT['prev_size']=0;
 $TXT['prev_width']=0;
 
 for ($i=3;$i<=$max_height*$koef;$i++){
  $tmp = imagettfbbox ($i, 0, $font, $text);
  $TXT['size']=$i;
  $TXT['width']=$tmp[2]-$tmp[0];
  if ($TXT['width']>$width*$koef){
   $TXT['width']=$TXT['prev_width'];
   $TXT['size']=$TXT['prev_size'];
   break;
  }
  $TXT['prev_width']=$TXT['width'];
  $TXT['prev_size']=$TXT['size'];
 }
 return $TXT;
}
function vText(&$img,$font,$text1,$text2,$text3,$textcolor,$h,$w,$size){
 
 $koef=1;
 $max_height=$size;
 //echo "--$max_height--";
 $colorA=split(",",$textcolor);
 //print_r ($colorA);
 $color=imagecolorclosest ($img, $colorA[0], $colorA[1], $colorA[2]);
 //$color=imagecolorexact ($img, $colorA[0], $colorA[1], $colorA[2]);
 if ($color=-1){
  //echo "Allocating";
  $color=imagecolorallocate ($img, $colorA[0], $colorA[1], $colorA[2]);
 }
 //$color=imagecolorclosest  ($img, 255, 255, 255);
 
 $TXTsize1=getTXTSize($font,$text1,$koef,$max_height,$w-10);
 $TXTsize2=getTXTSize($font,$text2,$koef,$max_height,$w-10);
 $TXTsize3=getTXTSize($font,$text3,$koef,$max_height,$w-10);
 
 $x1=round(($w*$koef-$TXTsize1[width])/2);
 $x2=round(($w*$koef-$TXTsize2[width])/2);
 $x3=round(($w*$koef-$TXTsize3[width])/2);
 
 $y1=$TXTsize1['size']*$koef+5;
 $y2=$y1+$TXTsize2['size']*$koef+5;
 $y3=$y2+$TXTsize3['size']*$koef+5;
 //echo "text1=$text1.x1=$x1.y1=$y1.color=$color.font=$font";
 imagettftext ($img,$TXTsize1['size'],0,$x1, $y1, $color, $font, $text1);
 imagettftext ($img,$TXTsize1['size'],0,$x2, $y2, $color, $font, $text2);
 imagettftext ($img,$TXTsize1['size'],0,$x3, $y3, $color, $font, $text3);
}
function vText2(&$dst_img,$src_img,$font,$text,$koef,$max_height,$width,$X,$Y,$Angle,$Color){
 $fontfile=$font;
 $conf['HeadLine_Color']=split(",",$Color);
 $headTextColor=imagecolorallocate ($dst_img, $conf['HeadLine_Color'][0], $conf['HeadLine_Color'][1], $conf['HeadLine_Color'][2]);
 if ($Angle){$padding=$Y;}
 else{$padding=$X;}
 $TXTsize=getTXTSize($fontfile,$text,$koef,$max_height,$width-$padding);
 if ($Angle){
  $start_txt_x=round(($width*$koef+$TXTsize[width])/2);//+$padding*$koef;//-$conf['HeadLine_X']*$conf['CoverImage_Quality'];
 }else{
  $start_txt_x=round(($width*$koef-$TXTsize[width])/2);//+$padding*$koef;//-$conf['HeadLine_X']*$conf['CoverImage_Quality'];
 }
 if ($Angle){
  $y=$start_txt_x;
  $x=$X*$koef;
 }else{
  $x=$start_txt_x;
  $y=$Y*$koef;
 }
 imagettftext ($dst_img,$TXTsize[size],$Angle,$x, $y, $headTextColor, $fontfile, $text);
}
?>