PHP code to upload files and add text and image watermarks-PHP Tutorial-php.cn

PHP code to upload files and add text and image watermarks

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Release： 2016-07-25 09:10:22

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/***************************************
Parameter description:
$max_file_size: Upload file size limit, unit BYTE
$destination_folder: Upload file path
$watermark: Whether to attach a watermark (1 means adding watermark, others means not adding watermark);
Instructions for use:
1. Change the PHP.INI file Remove the ; sign in front of the line "extension=php_gd2.dll" because we need to use the GD library;
2. Change extension_dir = to the directory where your php_gd2.dll is located;
************ ********/
//Upload file type list
$uptypes=array(
'image/jpg ',
'image/jpeg',
'image/png',
'image/pjpeg',
'image/gif',
'image/bmp',
'image/x-png'
);< /p>
$max_file_size=2000000; //About 2M, upload file size limit, unit BYTE
$destination_folder="uploadimg/"; //Upload file path
$watermark=1; //Whether to attach a watermark (1 is watermarked, others are not watermarked);
$watertype=1; //Watermark type (1 is text, 2 is picture)
$waterposition=1; //Watermark position (1 is the lower left corner, 2 is Lower right corner, 3 is the upper left corner, 4 is the upper right corner, 5 is the center);
$waterstring="JYS studio"; //Watermark string
$waterimg="xplore.gif";//Watermark image
$imgpreview= 1; //Whether to generate a preview image (1 means generate, others do not generate);
$imgpreviewsize=1/2; //Thumbnail ratio
?>
Upload file:
The file types allowed to be uploaded are:
< ;/form>
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
//Does the file exist?
if (!is_uploaded_file($_FILES["upfile"][tmp_name]) )
{
echo "The picture does not exist!";
exit;
}
$file = $_FILES["upfile"];
//Check the file size
if($max_file_size < ; $file["size"])
{
echo "The file is too big! Cannot exceed 2M! ";
exit;
}
//Check the file type
if(!in_array($file["type"], $uptypes))
{
echo "The file type does not match!" .$file["type"];
exit;
}
//If the uploaded folder does not exist, it will be automatically created
if(!file_exists($destination_folder))
{
mkdir ($destination_folder);
}
$filename=$file["tmp_name"]; //The temporary file name automatically generated by the system
$filenamecustom = $file["name"]; / /The file name uploaded by the user
$image_size = getimagesize($filename); //Image size
$pinfo=pathinfo($file["name"]); //The path information of the uploaded file
$ftype=$pinfo[' extension']; //The extension of the uploaded file
//$destination = $destination_folder.time().".".$ftype;//The directory + file name + file type of the uploaded file, the file name is determined by time() Generate
$destination = $destination_folder.$filenamecustom.".".$ftype;//Directory of uploaded file + user file name + file type
//Check whether the file with the same name exists
if (file_exists($destination) && $overwrite != true)
{
echo "The file with the same name already exists";
exit;
}
//Move the file to the specified directory
if( !move_uploaded_file ($filename, $destination))
{
echo "Error moving file";
exit;
}
$pinfo=pathinfo($destination); //Upload to the server The path information of the file
$fname=$pinfo[basename]; //The file name uploaded to the server
// echo " has been successfully uploaded!
File name: ".$destination_folder.$fname."
";
/ / echo " Uploaded successfully!
File name: ".$destination."
";
echo " Uploaded successfully!
File name: ".$destination_folder.$filenamecustom."
";
echo " Width:".$image_size[0 ];
echo " length: ".$image_size[1];
echo "
size: ".$file["size"]." bytes";
if($watermark==1)
{
$iinfo=getimagesize($destination,$iinfo); //Get the image size and type
$nimage=imagecreatetruecolor($image_size[0],$image_size[1]); //Create a true color image and return an image identifier Symbol,
//Represents a black image of size x_size and y_size
$white=imagecolorallocate($nimage,255,255,255); //nimage assigns color
$black=imagecolorallocate($nimage,0,0,0). ;
$red=imagecolorallocate($nimage,255,0,0);
imagefill($nimage,0,0,$white); //The coordinates x, y of the nimage image (the upper left corner of the image is 0, 0) Use color color to perform area filling
// (that is, points with the same color as the x, y point and adjacent points will be filled)
/*
1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5. = PSD, 6 = BMP, 7 = TIFF (intel byte order), 8 = TIFF (motorola byte order),
9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC, 14 = IFF, 15 = WBMP, 16 = XBM
*/
switch ($iinfo[2])
{
case 1:
$simage =imagecreatefromgif($destination); //The image obtained from the given file name
break;
case 2:
$simage =imagecreatefromjpeg($destination);
break;
case 3:
$simage =imagecreatefrompng($destination);
break;
case 6:
$simage =imagecreatefromwbmp($destination);
break;
default:
die("Unsupported file type"); //Equivalent to exit()
exit;
}
imagecopy($nimage,$simage,0,0,0,0,$image_size[0], $image_size[1]);//Copy simage starting from 0,0, $image_size[0] width, $image_size[1] height
//Copy a part of simage to the position with coordinates 0,0 in nimage
imagefilledrectangle($nimage,1,$image_size[1]-15,80,$image_size[1],$white);//Draw an upper left corner coordinate of 1 in the nimage image with white color , $image_size[1]-15
//Rectangle with lower right corner coordinates 80, $image_size[1]
switch($watertype)
{
case 1: //Add watermark string
imagestring($nimage,2, 3,$image_size[1]-15,$waterstring,$black);//Draw the waterstring in black to the 3,$image_size[1]-15 coordinates of nimage, and the font is the built-in font 2
break;
case 2 : //Add watermark image
$simage1 =imagecreatefromgif("xplore.gif");
imagecopy($nimage,$simage1,0,0,0,0,85,15);
imagedestroy($simage1); // Release the memory associated with simagel
break;
}
switch ($iinfo[2])
{
case 1:
//imagegif($nimage, $destination);
imagejpeg($nimage, $destination); // Creates a JPEG image with destination as the file name from the nimage image. The nimage parameter is the return value of the imagecreatetruecolor() function.
break;
case 2:
imagejpeg($nimage, $destination);
break;
case 3:
imagepng($nimage, $destination) );
break;
case 6:
imagewbmp($nimage, $destination);
//imagejpeg($nimage, $destination);
break;
}
//Release memory
imagedestroy($nimage);
imagedestroy($simage);
}
if($imgpreview==1)
{
echo "
Image preview:
";
echo "";
}
}
?>

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