Code sharing for php to generate thumbnails by percentage_PHP tutorial

/*
* param ori_img The name and path of the original image
* param new_img The name of the generated image
* param percent means to abbreviate according to the percentage of the original image. When this item is empty, it defaults to 50%
* param width specifies the abbreviated width
* param height specifies the abbreviated height
*
* Note: When percent width height is passed in, and percent>0, priority is given to Abbreviate by percentage
* by: http://www.jb51.net More source code to share with you
* Warm reminder: To use this function, you need to enable gd2 in php.ini
*
**/

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

$original = getimagesize($ori_img); / /Get the picture information, you can print_r($original) and find that it is an array
//$original[2] is the picture type, where 1 means gif, 2 means jpg, and 3 means 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 true color 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",15,0,0); //Generate 15% of the original image Thumbnail
makeThumb("bhsj.jpg", "suolue2.jpg",0,200,120); // Generate a thumbnail with a width of 100px and a height of 60px
makeThumb("bhsj.jpg", "suolue3. jpg",15,200,120); //Generate a thumbnail of 15% of the original image (when all parameters are filled in, the percentage priority is higher)

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