急~生成图片的代码，改了半天不行，求高手了

<?phpfunction str_div($str, $width = 10){	$strArr = array();	$len = strlen($str);	$count = 0;	$flag = 0;	while($flag < $len){		if(ord($str[$flag]) > 128){			$count += 1;			$flag += 3;		}		else{			$count += 0.5;			$flag += 1 ;		}		if($count >= $width){			$strArr[] = substr($str, 0, $flag);			$str = substr($str, $flag);			$len -= $flag;			$count = 0;			$flag = 0;		}	}	$strArr[] = $str;	return $strArr;}function str2rgb($str){	$color = array('red'=>0, 'green'=>0, 'blue'=>0);	$str = str_replace('#', '', $str);	$len = strlen($str);	if($len==6){		$arr=str_split($str,2);		$color['red'] = (int)base_convert($arr[0], 16, 10);		$color['green'] = (int)base_convert($arr[1], 16, 10);		$color['blue'] = (int)base_convert($arr[2], 16, 10);		return $color;	}	if($len==3){		$arr=str_split($str,1);		$color['red'] = (int)base_convert($arr[0].$arr[0], 16, 10);		$color['green'] = (int)base_convert($arr[1].$arr[1], 16, 10);		$color['blue'] = (int)base_convert($arr[2].$arr[2], 16, 10);		return $color;	}	return $color;}function makeimger($text = "内容获取失败...",$types,$ids){	$setStyle = '52A300'; #设置颜色,也可以开发为页面可选择并传递这个参数，用|格式	$haveBrLinker = ""; #超长使用分隔符	$fontFile = 'simfang.ttf'; #字体文件名,放font目录下,也可以开发为页面可选择并传递这个参数	$userStyle = explode('|', $setStyle); #分开颜色	$text = substr($text, 0, 1000); #截取前一万个字符	$text = iconv("GB2312", "UTF-8",$text); 	$imgpath = "".$types."/"; #图片存放地址	if(!is_dir($imgpath)){ mkdir($imgpath); }	$imgfile =  $imgpath . $ids . '.gif';	if(file_exists($imgfile))	{	return $imgfile;		}	else	{	//这里是边框宽度，可以前台传递参数	$paddingTop = 500;	$paddingLeft = 35;	$paddingBottom = 260;	$copyrightHeight = 0;		$canvasWidth = 640;	$canvasHeight = 1136;	//$canvasHeight = $paddingTop + $paddingBottom + $copyrightHeight;		$fontSize = 38;	$lineHeight = intval($fontSize * 1.8);		$textArr = array();	$tempArr = explode("\n", trim($text));	$j = 0;	foreach($tempArr as $v){		$arr = str_div($v, 25);		$textArr[] = array_shift($arr);		foreach($arr as $v){			$textArr[] = $haveBrLinker . $v;			$j ++;			if($j > 100){ break; }		}		$j ++;		if($j > 100){ break; }	}		$textLen = count($textArr);		$canvasHeight = $lineHeight * $textLen + $canvasHeight;	$im = imagecreatetruecolor($canvasWidth, $canvasHeight); #定义画布	$colorArray = str2rgb($userStyle[1]);	imagefill($im, 0, 0, imagecolorallocate($im, $colorArray['red'], $colorArray['green'], $colorArray['blue']));		$colorArray = str2rgb('000000');	$colorLine = imagecolorallocate($im, $colorArray['red'], $colorArray['green'], $colorArray['blue']);	$padding = 0;	$x1 = $y1 = $x4 = $y2 = $padding;	$x2 = $x3 = $canvasWidth - $padding - 1;	$y3 = $y4 = $canvasHeight - $padding - 1;	//可以开发为页面可选择并传递这个参数,选择是否显示边框以及颜色。	imageline($im, $x1, $y1, $x2, $y2, $colorLine);	imageline($im, $x2, $y2, $x3, $y3, $colorLine);	imageline($im, $x3, $y3, $x4, $y4, $colorLine);	imageline($im, $x4, $y4, $x1, $y1, $colorLine);	//字体路径，,也可以开发为页面可选择并传递这个参数	$fontStyle = 'font/' . $fontFile;	if(!is_file($fontStyle)){		exit('请先选择字体文件哦!');	}		//写入四个随即数字	$colorArray = str2rgb($userStyle[0]);	$fontColor = imagecolorallocate($im, $colorArray['red'], $colorArray['green'], $colorArray['blue']);		foreach($textArr as $k=>$text){		$offset = $paddingTop + $lineHeight * ($k + 1) - intval(($lineHeight-$fontSize) / 2);		imagettftext($im, $fontSize, 0, $paddingLeft, $offset, $fontColor, $fontStyle, $text);	}		$fontColor = imagecolorallocate($im, 0, 0, 0);	$offset += 18;	$text = '----------------------------------------------------------------------------------------------';	imagettftext($im, 10, 0, $paddingLeft, $offset, $fontColor, $fontStyle, $text);		$offset += 28;	$fontColor = imagecolorallocate($im, 255, 0, 0);	//也可以开发为页面可选择并传递这个参数,比如显示的文字，以及是否显示，显示位置等。	$text = '该图片来自...';	$text = iconv("GB2312", "UTF-8",$text); 	imagettftext($im, 14, 0, $paddingLeft + 160, $offset, $fontColor, $fontStyle, $text);	imagegif($im, $imgfile);	imagedestroy($im);	//echo $imgfile;    	//exit($imgfile);	}	return $imgfile;}$gg=$_POST['gg'];if($gg==""){//这里还可以增加字体颜色，背景颜色，边框颜色，字体大小，边框是否显示，边框宽度，选择显示的字体，以及最后行的版权等...    echo"<span style='color:red;'>请输入内容!</span>";     echo"<form action='' method='post'>";     echo "输入内容: <textarea name='gg' cols='80' rows='5' id='nzhan'></textarea><br>";    echo"<input type='submit' name='Submit' value='生成'>";     echo"</form>";     exit();}else{    $imghtml=makeimger($gg,"WeiBo",time().rand(1111,9999)); 		 echo"<p><img  src=".$imghtml." alt="急~生成图片的代码，改了半天不行，求高手了" ></p>"; }?>