PHP using the GD library to achieve text image watermark and thumbnail tutorial

We have to use the GD library must first open the GD library, specifically as follows

GD Library support for PHP under Windows

Find php.ini, open content, find:

; Extension=php_gd2.dll

Put the front semicolon ";" Remove, then save, if there is no semicolon, that is already open.

The specific reference can be referenced below: http://www.111cn.net/phper/php/48352.htm

One: Add text watermark using method

Require ' image.class.php '
$SRC = "001.jpg";
$content = "Hello";
$font _url= "My.ttf";
$size = 20;
$image =new image ($SRC);
$color =array (
0=>255,
1=>255,
2=>255,
2=>20
);
$local =array (
' X ' =>20,
' Y ' =>30
);
$angle = 10;
$image->fontmark ($content, $font _url, $size, $color, $local, $angle);
$image->show ();

Two: Picture thumbnail use method:

Require ' image.class.php '
$SRC = "001.jpg";
$image =new image ($SRC);
$image->thumb (300,200);
$image->show ();

Three: image.class.php

Class image{
Private $info;
Private $image;
Public Function __contruct ($SRC) {
$info = getimagesize ($SRC);
$this->info=array (
' Width ' => $info [0],
' Height ' => $info [1],
' Type ' =>image_type_to_extension ($info [2],false),
' MIME ' => $info [' MIME '],

);
$fun = "imagecreatefrom{$this->info[' type ']}";

$this->image= $fun ($SRC);

}

Thumbnail image
Public Function THUMD ($width, $height) {
$image _thumb= Imagecreatetruecolor ($width, $height);
Imagecopyresampled ($image _thumb, $this->image,0,0,0,0, $width, $height, $this->info[' width '], $this->info[ ' Height ']);
Imagedestroy ($this->image);
$this->image= $image _thumb;

}
Text watermark
Public Function Fontmark ($content, $font _url, $size, $color, $local, $angle) {

$col =imagecolorallocatealpha ($this->image, $color [0], $color [1], $color [2], $color [3]);
$text =imagettftext ($this->image, $size, $angle, $local [' X '], $local [' Y '], $col, $font _url, $content);
}
Output picture
Public Function Show ()
{
Header ("Content-type:", $this->info[' mime '));

$func = "image{$this->info[' type ']}";
$func ($this->image);

}
Public function Save ($nwename) {
$func = "image{$this->info[' type ']}";
Remove picture display from memory
$func ($this->image);
Save picture
$func ($this->image, $nwename. $this->info[' type ']);

}
Public Function _destruct () {

Imagedestroy ($this->image);
}

}