php 使用GD庫為圖片加水印

<?php

header ("Content-type: image/png");

$conn = MYSQL_connect("localhost", "root", "");     //連接數據庫

$colname_rs_article = $_GET['id'];              //獲取參數id

mysql_select_db("cms", $conn);                  //執行SQL

$query_rs_article = sprintf("SELECT * FROM articles WHERE article_id = %s", $colname_rs_article);

$rs_article = mysql_query($query_rs_article, $conn) or die(mysql_error());

$row_rs_article = mysql_fetch_assoc($rs_article);

$totalRows_rs_article = mysql_num_rows($rs_article);
$image = ImageCreateTrueColor(700, 1000);                   //創建畫布

$bg = ImageColorAllocate($image, 255, 255, 255);        //設置背景為白色

ImageFill($image, 0, 0, $bg);

$text_color = ImageColorAllocate($image, 0, 0, 0);      //設置文字顏色為黑色

imagestring($image, 5, 0, 0, $row_rs_article['title'], $text_color);        //輸出文章標題

imagestring($image, 3, 0, 20, $row_rs_article['author'], $text_color);  //輸出文章作者

imagestring($image, 4, 0, 60, $row_rs_article['content'], $text_color); //輸出文章內容

$logo = ImageCreateFromPNG('logo.png');         //獲得水印圖片

$logoW = ImageSX($logo);

$logoH = ImageSY($logo);

ImageCopy($image, $logo, 0, 0, 0, 0, $logoW, $logoH);           //合并文字圖片與水印圖片

ImageJPEG($image); // output to browser

ImageDestroy($logo);

ImageDestroy($image);

?></pre>