ThinkPHP做文字水印时提示call an undefined function exif_imagetype()解决方法

网络编程 2024/11/6 佚名

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本文实例讲述了ThinkPHP做文字水印时提示call an undefined function exif_imagetype()解决方法。分享给大家供大家参考。具体如下：

一、问题描述：

ThinkPHP做文字水印，今天做一个电子请帖，就把祝福语贴到图片上面，发现一直报错是取不到图片类型，比如gif，jpg等，并提示call an undefined function exif_imagetype()。

二、解决方法：

出现这个错误就是php.in 配置问题，打开即可：打开扩展 extension=php_exif.dll 如果再不行就把extension=php_mbstring.dll ,放到extension=php_exif.dll前边
注意：extension=php_exif.dll 扩展要打开
类文件：wptext_class.php代码如下：

复制代码代码如下:<"gif";
    $this->im = imagecreatefromgif($pict);
    break;
   case 2:
   $picext = "jpg";
    $this->im = imagecreatefromjpeg($pict);
    break;
   case 3:
   $picext = "png";
    $this->im = imagecreatefrompng($pict);
    break;
   default:
   $this->Errmsg("不支持的文件格式！");
    break;
   }
   //$this->picext = $picext;
   $this->GetTtPosit();
   $im   = $this->im;
   $size = $this->size;
   $angle= $this->angle;
   $px   = $this->px;
   $py   = $this->py;
   $color= $this->color;
   $font = $this->font;
   $text = $this->text;
   $color= imagecolorallocate($im, 255, 0, 0);
   imagettftext($im, $size, $angle, $px, $py, $color, $font, $text);
   switch ($picext) {
   case "gif":
   imagegif($im, $pict);
    break;
   case "jpg":
   imagejpeg($im, $pict, 100);
    break;
   case "png":
      imagealphablending($im, false);
        imagesavealpha($im, true);
       imagepng($im, $pict);
    break;
   }
   imagedestroy($im);
}
//错误信息提示
public function Errmsg($msg)
{
    echo "<script language='javascript'>alert('".$msg."');</script>";
}
//类结束
}
"codetitle">复制代码代码如下:<"Content-type: text/html; charset=gbk");
require("wptext_class.php");
$pict = "images/button2.png"; //目标图片
//$text = "XP/Vista/Win7"; //要添加的文字
$text = "文字水印测试";
$text = iconv("gb2312","utf-8",$text); //防止中文乱码
$size = 20; //文字大小
$font = "c:/windows/fonts/arial.ttf"; //字体
$angle = 0; //旋转角度,逆时针
$wptext = new WaterPrint();
$wptext->GetWpText($text);
$wptext->GetFtSize($size);
$wptext->GetFtType($font);
$wptext->GetTtAngle($angle);
$wptext->AddWpText($pict);
$wptext = null;
"images/button2.png" target="_blank">查看结果</a>