This article gives an example of how a PHP drawing loads an external picture. Share to everyone for your reference. The implementation methods are as follows:
In the practical application, is the common watermark function.
Copy Code code as follows:
<?php
1. Create Canvas
$im = Imagecreatetruecolor (300,200);//Create a new true color image, the default background is black, and return the image identifier. Another function, imagecreate, is deprecated.
2. Load external picture
$im _new = imagecreatefromjpeg ("baidu.jpg");//return image identifier
$im _new_info = getimagesize ("baidu.jpg");//Gets the image size and returns an array. This function does not need to use the GD library.
/*----
3, will load the picture, copy to the canvas
Parameter description:
$im: Needless to say, it refers to the canvas;
$im _new: Source picture, which is the image loaded from the outside
(30,30): The image to be loaded, placed in the canvas position, upper left corner
(0,0): Represents the loaded picture, starting from what position. (0,0) Represents the beginning of the upper-left corner, or it can only load part of a picture.
(*,*): with *, can be the original picture wide and high, can also be less than the width of the height, only part of the interception, with the above coordinates to use, to indicate the part of the interception
******/
Imagecopy ($im, $im _new,30,30,0,0, $im _new_info[0], $im _new_info[1])/return Boolean value
3. Output image
Header ("Content-type:image/png");
Imagepng ($im);//output to page. If there is a second argument [, $filename], the image is saved
4, destroy the image, free memory
Imagedestroy ($im);
?>
I hope this article will help you with your PHP program design.
