PHP uses ueditor to upload pictures and add watermarks

When the blog uploads pictures , I hope to put a watermark on my blog link , Nuggets ,csdn It's all done , I have to learn about it .

It's OK to upload pictures at ordinary times , When editing the article , Use ueditor Uploading pictures with watermark needs to be modified ueditor part PHP Source code , Let me make a general record here .

Start by opening php Under folder Uploader.class.php

find private function upFile(), This is the main processing method for uploading files ,

find 122 That's ok ： $this->stateInfo = $this->stateMap[0];

Add ：$this->imageWaterMark($this->filePath,9,'logo.png');

 imageWaterMark It's a custom function ,

I'll talk about ,$this->filePath This is the path to upload pictures ,9 Indicates the location of the watermark , In the lower right corner ,logo.png This is the watermark image you want to add , This is in the same directory /php/, If you want to put it in another path, please use a relative path .

The following is the custom function , Add to Uploader Class All parameters have been described in the function comments , You need to pay attention when calling

/* * function ：PHP Image watermarking ( Watermarks support pictures or text ) * Parameters ： *$groundImage Background image , That is, the image that needs to be watermarked , Only support temporarily GIF,JPG,PNG Format ; *$waterPos Watermark location , Yes 10 States ,0 Random location ; *1 Left for the top ,2 Center the top ,3 For the top right ; *4 Left for the middle ,5 Center for the middle ,6 To the right of the middle ; *7 For the bottom left ,8 Center the bottom end ,9 To the right of the bottom ; *$waterImage Image watermarking , That is, the image as a watermark , Only support temporarily GIF,JPG,PNG Format ; *$waterText Text watermarking , That is, take the text as a watermark , Support ASCII code , No Chinese support ; *$textFont Text size , The value is 1、2、3、4 or 5, The default is 5; *$textColor Text color , Value is hexadecimal color value , The default is #FF0000( Red ); * Be careful ：Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG *$waterImage and $waterText It's better not to use , Choose one of them , priority of use $waterImage. * When $waterImage Is valid , Parameters $waterString、$stringFont、$stringColor None of them are effective . * The file name and $groundImage equally . */ private function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$textColor="#FF0000") { $isWaterImage = FALSE; $formatMsg = " The file format is not supported at this time , Please use image processing software to convert the image into GIF、JPG、PNG Format ."; // Read watermark file if(!empty($waterImage) && file_exists($waterImage)) { $isWaterImage = TRUE; $water_info = getimagesize($waterImage); $water_w = $water_info[0];// Get the width of the watermark image $water_h = $water_info[1];// Get the height of the watermark image switch($water_info[2])// Get the format of the watermark image { case 1:$water_im = imagecreatefromgif($waterImage);break; case 2:$water_im = imagecreatefromjpeg($waterImage);break; case 3:$water_im = imagecreatefrompng($waterImage);break; default:die($formatMsg); } } // Read the background picture if(!empty($groundImage) && file_exists($groundImage)) { $ground_info = getimagesize($groundImage); $ground_w = $ground_info[0];// Get the width of the background image $ground_h = $ground_info[1];// Get the height of the background picture switch($ground_info[2])// Get the format of the background picture { case 1:$ground_im = imagecreatefromgif($groundImage);break; case 2:$ground_im = imagecreatefromjpeg($groundImage);break; case 3:$ground_im = imagecreatefrompng($groundImage);break; default:die($formatMsg); } } else { die(" The image that needs to be watermarked does not exist ！"); } // Watermark location if($isWaterImage)// Image watermarking { $w = $water_w; $h = $water_h; $label = " The image "; } else// Text watermarking { $temp = imagettfbbox(ceil($textFont*5),0,"./cour.ttf",$waterText);// Get used TrueType The range of text for the font $w = $temp[2] - $temp[6]; $h = $temp[3] - $temp[7]; unset($temp); $label = " Text area "; } if( ($ground_w<$w) || ($ground_h<$h) ) { echo " The length or width of the image to be watermarked is larger than the watermark ".$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 Left for the top $posX = 0; $posY = 0; break; case 2://2 Center the top $posX = ($ground_w - $w) / 2; $posY = 0; break; case 3://3 For the top right $posX = $ground_w - $w; $posY = 0; break; case 4://4 Left for the middle $posX = 0; $posY = ($ground_h - $h) / 2; break; case 5://5 Center for the middle $posX = ($ground_w - $w) / 2; $posY = ($ground_h - $h) / 2; break; case 6://6 To the right of the middle $posX = $ground_w - $w; $posY = ($ground_h - $h) / 2; break; case 7://7 For the bottom left $posX = 0; $posY = $ground_h - $h; break; case 8://8 Center the bottom end $posX = ($ground_w - $w) / 2; $posY = $ground_h - $h; break; case 9://9 To the right of the bottom $posX = $ground_w - $w - 10; // -10 It's the distance to the right 10px You can adjust yourself $posY = $ground_h - $h - 10; // -10 It's the distance from the bottom 10px You can adjust yourself break; default:// Random $posX = rand(0,($ground_w - $w)); $posY = rand(0,($ground_h - $h)); break; } // Set the color mixing mode of the image imagealphablending($ground_im, true); if($isWaterImage)// Image watermarking { imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);// Copy watermark to target file } else// Text watermarking { if( !emptyempty($textColor) && (strlen($textColor)==7) ) { $R = hexdec(substr($textColor,1,2)); $G = hexdec(substr($textColor,3,2)); $B = hexdec(substr($textColor,5)); } else { die(" Watermark text color format is incorrect ！"); } imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B)); } // Image after watermark generation @unlink($groundImage); switch($ground_info[2])// Get the format of the background picture { case 1:imagegif($ground_im,$groundImage);break; case 2:imagejpeg($ground_im,$groundImage);break; case 3:imagepng($ground_im,$groundImage);break; default:die($errorMsg); } // Free memory if(isset($water_info)) unset($water_info); if(isset($water_im)) imagedestroy($water_im); unset($ground_info); imagedestroy($ground_im); }

All right. , This is easy to use . It's easy to upload pictures with watermarks .

Please note that ： The watermark function requires GD Library module , Please check php Is... Installed GD Library module .

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