昨天在qq空间看见一篇“神奇的日志”，不同的访客看到同一张图片会显示对应访客的信息，用chrome 查看了下图片来源是个php文件； 基本原理就是 通过 php文件判断来源页面的url（url中包含qq号码），获取qq号码后通过腾讯的开放api接口，获取qq昵称和qq头像，
基本原理就是 通过 php文件判断来源页面的url（url中包含qq号码），获取qq号码后通过腾讯的开放api接口，获取qq昵称和qq头像，然后用gb函数画图，输出
<?php class Text2Img{
//$fontFile = 'msyh.ttc'; #字体文件名，请先拷贝一个字体到font目录下，然后修改此配置
private $LibiFontStyle = "mini.TTF";
private $LibiFontColor = "FF0000";
private $LibiBackColor = "FFFFFF";
private $haveBrLinker = "";
private $LibiWidth;
private $Message;
function __construct($options=array()){
foreach($options as $key=>$val){
if(!in_array($key,get_class_vars(get_class($this)))){
continue;
}else{
$this->$key=$val;
}
}
}
private function str_div($str, $width = 10){
$strArr = array();
$len = strlen($str);
$count = 0;
$flag = 0;
while($flag ';
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 $strArr;
}
private function str2rgb($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 $color;
}
public function text2Img($text){
if($text==''){
$this->Message = "没有文字";
return false;
}
$text = substr($text, 0, 30000); #截取前一万个字符
$paddingTop = 20;
$paddingLeft = 15;
$paddingBottom = 20;
$copyrightHeight = 36;
$canvasWidth = 440;
$canvasHeight = $paddingTop + $paddingBottom + $copyrightHeight;
$fontSize = 12;
$lineHeight = intval($fontSize * 1.8);
$textArr = array();
$tempArr = explode("\n", trim($text));
$j = 0;
foreach($tempArr as $v){
$arr = $this->str_div($v, 25);
$textArr[] = array_shift($arr);
foreach($arr as $v){
$textArr[] = $this->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 = $this->str2rgb($this->LibiBackColor);
imagefill($im, 0, 0, imagecolorallocate($im, $colorArray['red'], $colorArray['green'], $colorArray['blue']));
$colorArray = $this->str2rgb('666666');
$colorLine = imagecolorallocate($im, $colorArray['red'], $colorArray['green'], $colorArray['blue']);
$padding = 3;
$x1 = $y1 = $x4 = $y2 = $padding;
$x2 = $x3 = $canvasWidth - $padding - 1;
$y3 = $y4 = $canvasHeight - $padding - 1;
imageline($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, $colorLine);
//字体路径
if(!is_file($this->LibiFontStyle)){
$this->Message = "字体文件不存在！";
return false;
}
//写入四个随即数字
$colorArray = $this->str2rgb($this->LibiFontColor);
$fontColor = imagecolorallocate($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, $this->LibiFontStyle, $text);
}
$fontColor = imagecolorallocate($im, 0, 0, 0);
$offset += 18;
$text = '----END----';
imagettftext($im, 10, 0, $paddingLeft, $offset, $fontColor, $this->LibiFontStyle, $text);
$offset += 18;
$fontColor = imagecolorallocate($im, 255, 0, 0);
$text = 'By Libi';
imagettftext($im, 10, 0, $paddingLeft + 310, $offset, $fontColor, $this->LibiFontStyle, $text);
header('Content-Type: image/png');
imagepng($im, $imgfile);
imagedestroy($im);
}
}
?>
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