PHP beginners: learning PHP with divergent thinking

I learned several functions from the image function section of PHP every day. I think that in the course of learning, you need to know how to "play" and make a point.

PHP beginners!
After reading this question, I think the title has become demon again!
However, I think that my thoughts may give you some ideas to learn!

I think that in the course of learning, you should know how to play and make a sense of accomplishment. In that case, the learning effect and enthusiasm will soar,
You will enjoy your learning!

Example:

Today, I learned several functions from the image function section of PHP:

Getimagesize ()

Array getimagesize (string $ filename [, array & $ imageinfo])
The getimagesize () function will determine any GIF, JPG, PNG, SWF, SWC, PSD, TIFF, BMP, IFF, JP2, JPX, JB2, JPC, the size of the XBM or WBMP image file, the size of the returned image, the file type, and a height/width text string that can be used in the IMG mark of a common HTML file.

Imagecreatefromgif ()

Resource imagecreatefromgif (string $ filename)
Imagecreatefromgif () returns an image identifier, representing the image obtained from the given file name.
This function returns an operation handle to make it easier to use this image resource.
Similar functions include imagecreatefromjpeg () and imagecreatefrompng (). you can refer to the official online manual.

Imagecolorat ()

Int imagecolorat (resource $ image, int $ x, int $ y)
Returns the color index value of the specified position pixel in the image.

Imagecolorsforindex ()

Array imagecolorsforindex (resource $ image, int $ index)
This function returns an associated array with key names of red, green, blue, and alpha, containing the corresponding values of the specified color index.

You have read a rough introduction and it is estimated that you are sleepy, but please stick to it!

So how can I practice these functions?
Actually, when I learned these functions, I immediately thought of a very interesting thing to do!
What is it? You can guess ~!!!!
Check the code:

$ Url = "logo-yy.gif ";
$ Size = getimagesize ($ url );
$ Width = $ size [0];
$ Height = $ size [1];
$ Im = imagecreatefromgif ($ url );


For ($ y = 1; $ y <$ height; $ y ++ ){
For ($ x = 1; $ x <$ width; $ x ++ ){
$ Color_index = imagecolorat ($ im, $ x, $ y );
$ Color_tran = imagecolorsforindex ($ im, $ color_index );
Echo ("");
Echo ("love ");
Echo ("");
}
Echo ("
");
}
?>

Note that the function used in my program is imagecreatefromgif ()
Therefore, the $ url variable points to a file in GIF format. to point to a file in JPG format, use imagecreatefromjpeg ()
Of course, we can write it together, because the first function can determine the image format. I will not write it here !! Haha
Now, you have a php environment and try something! Haha

We do not recommend using too many images! Just a small logo!
Otherwise, don't blame me for not telling you!
This example is useless !! However, it can stimulate everyone's learning pleasure !!
To those who are learning PHP!