PHP Multi-image upload code to add watermarks

PHP watermark function function Imagewatermark ($groundImage, $waterPos =0, $waterImage = "", $waterText = "", $textFont =5, $textColor = "#FF0000") { $isWaterImage = FALSE; $FORMATMSG = "Does not support this file format, please use the picture processing software to convert the picture to GIF, JPG, PNG format. "; Read Watermark File if (!empty ($waterImage) && file_exists ($waterImage)) { $isWaterImage = TRUE; $water _info = getimagesize ($waterImage); What you get is an array. $water _w = $water _info[0];//To obtain the width of the watermark picture $water _h = $water _info[1];//To obtain a high watermark image Switch ($water _info[2])//Get the format of the watermark picture { Case 1: $water _im = Imagecreatefromgif ($waterImage); Convert a picture to PHP's recognizable encoding process Case 2: $water _im = Imagecreatefromjpeg ($waterImage); Convert a picture to PHP's recognizable encoding process Case 3: $water _im = Imagecreatefrompng ($waterImage); Convert a picture to PHP's recognizable encoding process Default:die ($FORMATMSG); } } Read background picture if (!empty ($groundImage) && file_exists ($groundImage)) { $ground _info = getimagesize ($groundImage); $ground _w = $ground _info[0];//Get the width of the background image $ground _h = $ground _info[1];//get a high background picture Switch ($ground _info[2])//Get the format of the background picture { Case 1: $ground _im = Imagecreatefromgif ($groundImage); Case 2: $ground _im = Imagecreatefromjpeg ($groundImage); Case 3: $ground _im = Imagecreatefrompng ($groundImage); Default:die ($FORMATMSG); } } Else { Die ("The picture that needs watermark does not exist!") "); } Watermark Location if ($isWaterImage)//Picture watermark { $w = $water _w; $h = $water _h; $label = "Picture"; } else//text watermark { $temp = Imagettfbbox (ceil ($textFont *2.5), 0, "C:/windows/fonts/stcaiyun.ttf", $waterText);//Gets the range of text that uses TrueType fonts $w = $temp [2]-$temp [6]; $h = $temp [3]-$temp [7]; Unset ($temp); $label = "Text Area"; } if ($ground _w< $w) | | ($ground _h< $h)) { echo "The length or width of the picture that needs to be watermarked is more than a watermark". $label. " Still small, unable to generate watermark! "; Return } Switch ($waterPos) { Case 0://Random $posX = rand (0, ($ground _w-$w)); $posY = rand (0, ($ground _h-$h)); Break Case 1://1 for top left $posX = 0; $posY = 0; Break Case 2://2 centered on the top $posX = ($ground _w-$w)/2; $posY = 0; Break Case 3://3 for top right $posX = $ground _w-$w; $posY = 0; Break Case 4://4 for the middle left $posX = 0; $posY = ($ground _h-$h)/2; Break Case 5://5 centered in the middle $posX = ($ground _w-$w)/2; $posY = ($ground _h-$h)/2; Break Case 6://6 for the middle right $posX = $ground _w-$w; $posY = ($ground _h-$h)/2; Break Case 7://7 for Bottom left $posX = 0; $posY = $ground _h-$h; Break Case 8://8 centered at bottom $posX = ($ground _w-$w)/2; $posY = $ground _h-$h; Break Case 9://9 for bottom right $posX = $ground _w-$w; $posY = $ground _h-$h; Break default://Random $posX = rand (0, ($ground _w-$w)); $posY = rand (0, ($ground _h-$h)); Break } To set the color blending mode of an image Imagealphablending ($ground _im, true); if ($isWaterImage)//Picture watermark { Imagecopy ($ground _im, $water _im, $posX, $posY, 0, 0, $water _w, $water _h);//copy watermark to target file } else//text watermark { if (!empty ($textColor) && (strlen ($textColor) ==7)) { $R = Hexdec (substr ($textColor,)); $G = Hexdec (substr ($textColor, 3,2)); $B = Hexdec (substr ($textColor, 5)); } Else { Die ("Watermark text color format is not correct! "); } Imagestring ($ground _im, $textFont, $posX, $posY, $waterText, Imagecolorallocate ($ground _im, $R, $G, $B)); } Create a picture after a watermark @unlink ($groundImage); Switch ($ground _info[2])//Get the format of the background picture { Case 1:imagegif ($ground _im, $groundImage); Create a picture in GIF format Case 2:imagejpeg ($ground _im, $groundImage); Create a picture in JPEG format Case 3:imagepng ($ground _im, $groundImage); Create a picture in PNG format Default:die ($ERRORMSG); } Freeing memory if (Isset ($water _info)) unset ($water _info); if (Isset ($water _im)) Imagedestroy ($water _im); unset ($ground _info); Imagedestroy ($ground _im); } ?> PHP Image upload code: for ($i =0; $i { $upfile = "./img/". ($i + 1). ". PNG ";//Here's your path. if (Move_uploaded_file ($_files[' userfile '] [' tmp_name '] [$i], $upfile)) { Imagewatermark ($upfile, 9, "./shuiyin.png", "Made by Chenduan", 5, "#FF0000"); /* * Function: Image watermark (watermark supports picture or text) * Imagewatermark ($groundImage, $waterPos =0, $waterImage = "", $waterText = "", $textFont =5, $textColor = "#FF0000") Parameters * $groundImage background image, that is, need to add a watermark image, temporarily only support gif,jpg,png format; * $waterPos watermark position, there are 10 kinds of states, 0 is a random position; * 1 for the top left, 2 for the top center, 3 for the top right; * 4 for the middle of the left, 5 for the Middle center, 6 for the middle right; * 7 for the bottom of the left, 8 for the bottom center, 9 for the bottom of the right; * $waterImage image watermark, that is, as a watermark image, temporarily only support gif,jpg,png format; * $waterText text watermark, that is, the text as a watermark, support ASCII code, does not support Chinese; * $textFont Text size, value 1, 2, 3, 4 or 5, default is 5; * $textColor text color, value is hexadecimal color value, default is #ff0000 (red); */ echo ""; echo "First". ($i + 1). " Picture Operation succeeded "; } else{ echo "First". ($i + 1). " Picture can't be uploaded. "; } } ?> Copy Code

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