PHP code for screenshots without deformation-PHP Tutorial-php.cn

PHP code for screenshots without deformation

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Release： 2016-07-25 08:46:10

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function my_image_resize($src_file, $dst_file , $new_width , $new_height)
{
$src_img=imagecreatefromjpeg($src_file);
$w=imagesx($src_img);
$h= imagesy($src_img);
$ratio_w=1.0 * $new_width / $w;
$ratio_h=1.0 * $new_height / $h;
$ratio=1.0;
// The height and width of the generated image are smaller than the original one , or both are large, the principle is to use a large ratio to enlarge, and use a large ratio to reduce (the reduced ratio will be smaller)
if( ($ratio_w < 1 && $ratio_h < 1) || ($ratio_w > 1 && $ratio_h > 1))
{
if($ratio_w < $ratio_h)
{
$ratio = $ratio_h ; // Case 1, the width ratio is smaller than the height direction, crop according to the height ratio standard or Zoom in
}else {
$ratio = $ratio_w ;
}
// Define an intermediate temporary image whose aspect ratio just meets the target requirements
$inter_w=(int)($new_width / $ratio);
$inter_h=(int) ($new_height / $ratio);
$inter_img=imagecreatetruecolor($inter_w , $inter_h);
imagecopy($inter_img, $src_img, 0,0,0,0,$inter_w,$inter_h) ;
// Generate a temporary image with the maximum side length as the size of the target image $ratio
// Define a new image
$new_img=imagecreatetruecolor($new_width,$new_height);
imagecopyresampled($new_img,$ inter_img,0,0,0,0,$new_width,$new_height,$inter_w,$inter_h);
//imagejpeg($new_img, $dst_file,100); // Store image
}
// end if 1
// 2 One side of the target image is larger than the original image, and one side is smaller than the original image. First enlarge the ordinary image, and then crop it
//if( ($ratio_w < 1 && $ratio_h > 1) || ($ratio_w > ;1 && $ratio_h <1) )
else
{
$ratio=$ratio_h>$ratio_w? $ratio_h : $ratio_w; //Take the value with the larger ratio
//Define a large image in the middle, the image The height or width is equal to the target image, and then enlarge the original image
$inter_w=(int)($w * $ratio);
$inter_h=(int) ($h * $ratio);
$inter_img=imagecreatetruecolor ($inter_w , $inter_h);
//Crop the original image after scaling it
imagecopyresampled($inter_img,$src_img,0,0,0,0,$inter_w,$inter_h,$w,$h);
/ / Define a new image
$new_img=imagecreatetruecolor($new_width,$new_height);
imagecopy($new_img, $inter_img, 0,0,0,0,$new_width,$new_height);
}
imagejpeg($new_img , $dst_file,100); //Storage image
}
$filename = "110.jpg"; //The path of the original image
$fileto="120.jpg";//The path to save after taking the screenshot
$new_w =300;//Set width
$new_h=350; //Set height
my_image_resize($filename,$fileto,$new_w,$new_h);
?>

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No deformation, PHP