PHP gd2 uploads pictures/text watermarks/picture watermarks/proportional thumbnails/implementation code

PHP gd2 uploads pictures/text watermarks/picture watermarks/proportional thumbnails/implementation code_PHP tutorial

WBOY

Release： 2016-07-21 15:38:25

Original

829 people have browsed it

Copy code The code is as follows:

//Upload file type list
$uptypes=array(
'image/jpg',
'image/jpeg',
'image /png',
'image/pjpeg',
'image/gif',
'image/bmp',
'image/x-png'
);
$ max_file_size = 200000; //Upload file size limit, unit BYTE
$path_im = "prod_img/"; //Generate large image saving folder path
$path_sim = "prod_simg/"; //Thumbnail image saving file Clip path
$watermark = 1; //Whether to add watermark (1 means adding watermark, others means not adding watermark);
$watertype = 1; //Watermark type (1 means text, 2 means picture)
$waterstring = "[url=http://www.jy17.com/]http://www.jy17.com/[/url]"; //Watermark string
$waterimg = "water. png"; //Watermark image file path
$waterclearly = 100; //Watermark transparency 0-100, smaller numbers are more transparent
$imclearly = 100; //Picture clarity 0-100, the larger the number, the clearer it is , the larger the file size
$simclearly = 75; //Thumbnail resolution 0-100, the larger the number, the clearer the file size, the larger the file size
$smallmark = 1; //Whether to generate a thumbnail (1 is plus Generate, others are not);
$dst_sw = 80; //Define the thumbnail width. I use equal proportion scaling for the height, so just compare the width.
?>

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
if (!is_uploaded_file($_FILES["upfile"][tmp_name]))
//Does the file exist?
{
echo "The picture does not exist!";
exit;
}
$file = $_FILES["upfile"];
if($ max_file_size < $file["size"])
//Check file size
{ $max_file_size = $max_file_size/1000;
echo "The file is too large, exceeding ".$max_file_size." KB!" ;
exit;
}
if(!in_array($file["type"],$uptypes))
//Check file type
{
echo "File type does not match !".$file["type"];
exit;
}
if(!file_exists($path_im))
//Check whether the upload directory exists, if not create
{
mkdir($path_im);
}
if(!file_exists($path_sim))
//Check whether the thumbnail directory exists, if not create it
{
mkdir($ path_sim);
}
$filename = $file["tmp_name"];
$im_size = getimagesize($filename);
$src_w = $im_size[0];
$src_h = $im_size[1];
$src_type = $im_size[2];
$pinfo = pathinfo($file["name"]);
$filetype = $pinfo['extension'];
$all_path = $path_im.time().".".$filetype; //Path + file name, currently named after upload time
if (file_exists($all_path))
{
echo "The file with the same name already exists";
exit;
}
if(!move_uploaded_file ($filename,$all_path))
{
echo "Error moving file";
exit;
}
$pinfo = pathinfo($all_path);
$fname = $pinfo[basename];
echo "has been successfully uploaded
File name: ".$all_path."
";
echo "Width: ".$src_w."px ";
echo "Length:".$src_h."px ";
echo "
Size: ".$file["size"]." bytes";
switch($src_type)//Judgement source Image file type
{
case 1://gif
$src_im = imagecreatefromgif($all_path);//Get the image from the source image file
break;
case 2://jpg
$src_im = imagecreatefromjpeg($all_path);
break;
case 3://png
$src_im = imagecreatefrompng($all_path);
break;
//case 6 :
//$src_im=imagecreatefromwbmp($all_path);
//break;
default:
die("Unsupported file type");
exit;
}
if($watermark == 1)
{
//$iinfo = getimagesize($all_path,$iinfo);
$dst_im = imagecreatetruecolor($src_w,$src_h);
//Create a true color bitmap of the same size based on the original image size
$white = imagecolorallocate($dst_im,255,255,255);//White
//Fill the new image with the background color
$black = imagecolorallocate ($dst_im,0,0,0);//Black
$red = imagecolorallocate($dst_im,255,0,0);//Red
$orange = imagecolorallocate($dst_im,255,85, 0);//Orange
imagefill($dst_im,0,0,$white);
imagecopymerge($dst_im,$src_im,0,0,0,0,$src_w,$src_h,100); //The original image is written into the new true color bitmap
//imagefilledrectangle($dst_im,1,$src_h-15,80,$src_h,$white);
switch($watertype)
{
case 1: //Watermark string
imagestring($dst_im,5,5,$src_h-20,$waterstring,$orange);//Text watermark, font No. 5, color orange, located in the background The lower left corner of the picture
break;
case 2: //Watermark image
$lim_size = getimagesize($waterimg); //Get the watermark image size, information
switch($lim_size[2]) //Determine the watermark image file type
{
case 1://gif
$src_lim = imagecreatefromgif($waterimg); //Get the watermark image
break;
case 2:// jpg
$src_lim = imagecreatefromjpeg($waterimg);
break;
case 3://png
$src_lim = imagecreatefrompng($waterimg);
break;
//case 6:
//$src_im=imagecreatefromwbmp($waterimg);
//break;
default:
die("Unsupported file type");
exit;
}
$src_lw = ($src_w-$lim_size[0])/2; //The watermark is located at the width positioning in the center of the background image
$src_lh = ($src_h-$lim_size[1])/2; / /height positioning
imagecopymerge($dst_im,$src_lim,$src_lw,$src_lh,0,0,$lim_size[0],$lim_size[1],$waterclearly);// Merge two images and set watermark transparency $waterclearly
imagedestroy($src_lim);
break;
}
switch($src_type)
{
case 1:
imagegif($dst_im,$all_path,$ imclearly);//Generate gif files, image clarity 0-100
break;
case 2:
imagejpeg($dst_im,$all_path,$imclearly);//Generate jpg files, image clarity 0-100
break;
case 3:
imagepng($dst_im,$all_path,$imclearly);//Generate png file, image definition 0-100
break;
/ /case 6:
//imagewbmp($dst_im,$all_path);
break;
}
//Release cache
imagedestroy($dst_im);
}
if($smallmark == 1)
{
$sall_path = $path_sim.time().".".$filetype;
if (file_exists($sall_path))
{
echo "The file with the same name already exists";
exit;
}
if($src_w <= $dst_sw) // Original image size<= Thumbnail size
{
$ dst_sim = imagecreatetruecolor($src_w,$src_h); //Create a new thumbnail true color bitmap
imagecopymerge($dst_sim,$src_im,0,0,0,0,$src_w,$src_h,100); // The original image is written into the new true color bitmap
}
if($src_w > $dst_sw) // Original image size > Thumbnail size
{
$dst_sh = $dst_sw/ $src_w*$src_h;
$dst_sim = imagecreatetruecolor($dst_sw,$dst_sh); //Create a new thumbnail true color bitmap (reducing the original image size proportionally)
imagecopyresampled($dst_sim,$src_im,0 ,0,0,0,$dst_sw,$dst_sh,$src_w,$src_h); //The original image is written into the new true color bitmap
}
switch($src_type)
{
case 1:
imagegif($dst_sim,$sall_path,$simclearly);//Generate gif file, image resolution 0-100
break;
case 2:
imagejpeg($dst_sim ,$sall_path,$simclearly);//Generate jpg file, image resolution 0-100
break;
case 3:
imagepng($dst_sim,$sall_path,$simclearly);//Generate png File, image resolution 0-100
break;
//case 6:
//imagewbmp($dst_sim,$sall_path);
break;
}
//release Cache
imagedestroy($dst_sim);
}
//Release cache
imagedestroy($src_im);
}
?>

php Function 2 to generate thumbnails in equal proportions

Copy code The code is as follows:

 
function reSizeImg($imgSrc, $resize_width, $resize_height, $isCut=false) { 
//Type of image
$type = substr ( strrchr ( $imgSrc, "." ), 1 ); 
//Initialize image
if ($type == "jpg") { 
$im = imagecreatefromjpeg ( $imgSrc ); 
} 
if ($type == "gif") { 
$im = imagecreatefromgif ( $imgSrc ); 
} 
if ($type == "png") { 
$im = imagecreatefrompng ( $imgSrc ); 
 } 
//Target image address
$full_length = strlen ( $imgSrc ); 
$type_length = strlen ( $type ); 
$name_length = $full_length - $type_length; 
$ name = substr ( $imgSrc, 0, $name_length - 1 ); 
$dstimg = $name . "_s." . $type; 
$width = imagesx ( $im ); 
$height = imagesy ( $im ); 
//Generate image
//Changed image ratio
$resize_ratio = ($resize_width) / ($resize_height); 
//Actual image The ratio of
$ratio = ($width) / ($height); 
if (($isCut) == 1) //Cut image
{ 
if ($ratio >= $ resize_ratio) //High priority 
{ 
$newimg = imagecreatetruecolor ( $resize_width, $resize_height ); 
imagecopyresampled ( $newimg, $im, 0, 0, 0, 0, $resize_width, $resize_height, (($height) * $resize_ratio), $height ); 
ImageJpeg ( $newimg, $dstimg ); 
} 
if ($ratio < $resize_ratio) //Width priority
{ 
$newimg = imagecreatetruecolor ( $resize_width, $resize_height ); 
imagecopyresampled ( $newimg, $im, 0, 0, 0, 0, $resize_width, $resize_height, $width, (($width) / $ resize_ratio) ); 
ImageJpeg ( $newimg, $dstimg ); 
} 
} else //Do not crop the image
{ 
if ($ratio >= $resize_ratio) { 
$newimg = imagecreatetruecolor ( $resize_width, ($resize_width) / $ratio ); 
imagecopyresampled ( $newimg, $im, 0, 0, 0, 0, $resize_width, ($resize_width) / $ratio, $width , $height ); 
ImageJpeg ( $newimg, $dstimg ); 
} 
if ($ratio < $resize_ratio) { 
$newimg = imagecreatetruecolor ( ($resize_height) * $ratio, $resize_height ); 
imagecopyresampled ( $newimg, $im, 0, 0, 0, 0, ($resize_height) * $ratio, $resize_height, $width, $height ); 
ImageJpeg ( $newimg, $ dstimg ); 
} 
} 
ImageDestroy ( $im ); 
} 