Php code sharing for generating thumbnails by percentage _ PHP Tutorial

Php generates code sharing for thumbnails by percentage. After reading the manual, I learned a few functions and wrote a simple php code to generate thumbnails. No class is used. I think a function can be done. for beginners, I read the manual and understand a few functions. Then I Wrote a Simple php thumbnails program. No class is used. I think a function can be done, and it is easier for beginners to understand and help more people.

You can scale down by score. you can scale down by a specified length or width. the default value is by percentage. The comments in the program have been very detailed. if you have any questions, please leave a message below. please contact me.

The source code is as follows:

The code is as follows:

/*
* Param ori_img original image name and path
* Param new_img: name of the image generated
* Param percent: scale down based on the percentage of the source image. If this parameter is left blank, the default value is 50%.
* Param width specifies the scaled width.
* Param height specifies the scaled height.
*
* Note: When both the percent width and height values are input and the percent value is greater than 0, the values are scaled down by percentage first.
* By: http://www.jb51.net more source code to share with you
* Tip: to use this function, you must enable gd2 in php. ini.
*
**/

Function makeThumb ($ ori_img, $ new_img, $ percent = 50, $ width = 0, $ height = 0 ){

$ Original = getimagesize ($ ori_img); // Obtain the image information. print_r ($ original) can find that it is an array.
// $ Original [2] indicates the image type. 1 indicates gif, 2 indicates jpg, and 3 indicates png.
Switch ($ original [2]) {
Case 1: $ s_original = imagecreatefromgif ($ ori_img );
Break;
Case 2: $ s_original = imagecreatefromjpeg ($ ori_img );
Break;
Case 3: $ s_original = imagecreatefrompng ($ ori_img );
Break;
}

If ($ percent> 0 ){
$ Width = $ original [0] * $ percent/100;
$ Width = ($ width> 0 )? $ Width: 1;
$ Height = $ original [1] * $ percent/100;
$ Height = ($ height> 0 )? $ Height: 1;
}

// Create a canvas
$ Canvas = imagecreatetruecolor ($ width, $ height );
Imagecopyresized ($ canvas, $ s_original, 0, 0, 0, 0, $ width, $ height, $ original [0], $ original [1]);
// Header ("Content-type: image/jpeg ");
// Imagejpeg ($ canvas); // output the image to the browser
$ Loop = imagejpeg ($ canvas, $ new_img); // generate a new image
If ($ loop ){
Echo "OK!
";
}
}

MakeThumb ("bhsj.jpg", "suolue1.jpg", 5%, 0); // Generate the original thumbnail
MakeThumb ("bhsj.jpg", "suolue2.jpg", 0,200,120); // Generate a thumbnail with a width of PX and a height of 60 px
MakeThumb ("bhsj.jpg", "suolue3.jpg", 15,200,120); // Generate the original 5% thumbnail (the percentage has a higher priority when all parameters are set)

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Bytes. No use of classes, I think a function can be done, and more...