问题一：

图片通过GD库生成会出现文字漂白问题，或者不显示，调试浪费了我半天的时间

合成图片颜色是真问题，困扰我很久最后解决了

原来imagecreate不支持更多的色彩

imagecreatetruecolor解决了这个问题

本函数需要 GD 2.0.1 或更高版本(推荐 2.0.28 及更高版本)。

代码如下

/**

* @desc 创建结果图片

* @param

* @return file

*/

public function create_userimg() {

$user_name = addslashes($this->input->get('name'));

$user_name = urldecode($user_name);

$user_score = (int)$this->input->get('score');

if (preg_match("/^[x7f-xff]+$/", $user_name)) {

$user_name_len = mb_strlen($user_name);

$user_name_len = ceil($user_name_len/3);

$nickleft = 30+60*$user_name_len;

}else{

$user_name_len = strlen($user_name);

$nickleft = 120+13*$user_name_len;

}

$font = '.'.PATH_FONT.'/yahei.ttf';

$font_kaiti = '.'.PATH_FONT.'/SIMLI.TTF';

$size = 25;

//$bgimg = 'resource/default/images/lohas/result_bg.png';

$bgimg = 'resource/default/images/shishang/result_show.png';

$nick = 'resource/default/images/shishang/shishang_nick.png';

$im = @imagecreatetruecolor(506,432) or die("Cannot Initialize new GD image stream");

$white = imagecolorallocate( $im, 255, 255, 255 );

imagefill( $im, 0, 0, $white );

imagecopy($im, $this->Image, 0, 0, 0, 0, 506, 432);

$bgimg = imagecreatefrompng($bgimg);

imagecopy($im,$bgimg,0,0,0,0,506,432);

$nick = imagecreatefrompng($nick);

imagecopy($im,$nick,$nickleft,136,0,0,77,14);

$green=imagecolorallocate($im,68,160,28);

$hei=imagecolorallocate($im,0,0,0);

$bai=imagecolorallocate($im,255,255,255);

if (preg_match("/^[x7f-xff]+$/", $user_name)) {

imagettftext($im,'25',0,62,150,$hei,$font_kaiti,$user_name);

}else{

imagettftext($im,'21',0,62,150,$hei,$font,$user_name);

}

imagettftext($im,'12',0,70,209,$green,$font,$text_1);

imagettftext($im,'11',0,170,238,$green,$font,$text_2);

imagettftext($im,'12',0,360,210,$green,$font,$score);

imagettftext($im,'11',0,95,237,$green,$font,$user_vs);

imagettftext($im,'10',0,330,340,$hei,$font,$date_text);

header("Content-type: image/png");

imagepng($im);

imagedestroy($im);

} 问题二：

PHP中文换行问题，因为文字要写在图片里，类似css的自动换行，

php对英文有wordwrap()函数支持换行，但不支持中文,下面函数解决了PHP中文换行问题

代码如下

/**

* @desc GD库生成图片中文自动换行

* 这几个变量分别是 字体大小, 角度, 字体名称, 字符串, 预设宽度

* */

public function autowrap($fontsize, $angle, $fontface, $string, $width) {

$content = "";

// 将字符串拆分成一个个单字 保存到数组 letter 中

for ($i=0;$i

$letter[] = mb_substr($string, $i, 1);

}

foreach ($letter as $l) {

$teststr = $content."".$l;

$testbox = imagettfbbox($fontsize, $angle, $fontface, $teststr);

// 判断拼接后的字符串是否超过预设的宽度

if (($testbox[2] > $width) && ($content !== "")) {

$content .= "n";

}

$content .= $l;

}

$content = mb_convert_encoding($content, "html-entities","utf-8" );

return $content;

}

问题三：

我在调用数据库接口的时候，取XML中的CDATA数据

解析XML中带有问题，“  ”，

CDATA中的数据取不到值，simplexml_load_string函数解决问题

simplexml_load_string($response, SimpleXMLElement , LIBXML_NOCDATA);

代码如下

/**

* @desc CURL提交XML返回食材库XMl数据

* @param STRING XML

*

@return XML

*/

private function do_curl_post($xmldata){

$url = SITE_URL.$this->shicai_interface;

$header[] = "Content-type: text/xml";

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_POSTFIELDS, $xmldata);

$response = curl_exec($ch);

$response = simplexml_load_string($response, SimpleXMLElement , LIBXML_NOCDATA);

if(curl_errno($ch)){

print curl_error($ch);

}

curl_close($ch);

return $response;

}