ThinkPHP prompts call an undefined function exif_imagetype() solution when making text watermark, _PHP tutorial

ThinkPHP prompts call an undefined function exif_imagetype() solution when making text watermarks,

The example in this article describes the solution to the problem that ThinkPHP prompts call an undefined function exif_imagetype() when making text watermarks. Share it with everyone for your reference. The details are as follows:

1. Problem description:

ThinkPHP makes text watermarks. Today I made an electronic invitation and pasted the blessing words on the picture. I found that it kept reporting errors and could not get the image type, such as gif, jpg, etc., and prompted call an undefined function exif_imagetype().

2. Solution:

This error is a php.in configuration problem, just open it: Open the extension extension=php_exif.dll. If it still doesn’t work, put extension=php_mbstring.dll in front of extension=php_exif.dll
Note: extension=php_exif.dll extension needs to be turned on
Class file: wptext_class.php code is as follows:

Copy code The code is as follows:

/*
PHP adds text watermark class V1.0
Author: Yu Tiedun
Email:
Modification date: 2010-03-07
Supported image formats: gif, jpg, png
The position of the watermark can be adjusted as needed
If you can modify it better, please send me a copy
*/
class WaterPrint
{
//Class start
Public $text, $color, $size, $font, $angle, $px, $py, $im;
//Text to add
public function GetWpText($text)
{
$this->text = $text;
}
//Add text color
public function GetFtColor($color)
{
$this->color = $color;
}
//Add text font
public function GetFtType($font)
{
$this->font = $font;
}

//Add text size
public function GetFtSize($size)
{
$this->size = $size;
}
//Angle of text rotation
public function GetTtAngle($angle)
{
$this->angle = $angle;
}
//Add text position
public function GetTtPosit()
{
$this->px = 10;
$this->py = imagesy($this->im) - 20;
}
//Add text watermark
public function AddWpText($pict)
{
$ext = exif_imagetype($pict);
switch ($ext) {
case 1:
$picext = "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:
$this->Errmsg("Unsupported file format!");
Break;
}
//$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);
}
//Error message prompt
public function Errmsg($msg)
{
echo "";
}
//End of class
}
?>

Calling page: index.php code is as follows:

Copy code The code is as follows:

header("Content-type: text/html; charset=gbk");
require("wptext_class.php");
$pict = "images/button2.png"; //Target image
//$text = "XP/Vista/Win7"; //Text to be added
$text = "Text watermark test";
$text = iconv("gb2312","utf-8",$text); //Prevent Chinese garbled characters
$size = 20; //Text size
$font = "c:/windows/fonts/arial.ttf"; //Font
$angle = 0; //Rotation angle, counterclockwise
$wptext = new WaterPrint();
$wptext->GetWpText($text);
$wptext->GetFtSize($size);
$wptext->GetFtType($font);
$wptext->GetTtAngle($angle);
$wptext->AddWpText($pict);
$wptext = null;
?>
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I hope this article will be helpful to everyone’s ThinkPHP framework programming.

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