Question

我正在尝试使用存储在MySQL数据库中的RGB或十六进制值创建一个带背景填充的.jpg文件。我想遍历记录并为我拥有的500个值创建一个.jpg，并用十六进制值命名它们。我找到了post similar to mine，但无法让它发挥作用。

我的数据库中的字段是hexValue（样本数据; B0171F），r，g，b。它存储了各自的价值。

我是php的新手，可以使用一些帮助。这是我试图使用的代码。

    <?php
$username = "john";
$password = "myPassword";
$hostname = "localhost"; 

//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password) 
 or die("Unable to connect to MySQL");
echo "Connected to MySQL<br>";

//select a database to work with
$selected = mysql_select_db("mycolors",$dbhandle) 
  or die("Could not select Colors");

//execute the SQL query and return records
$sql = mysql_query("SELECT r, g, b FROM thex")
    or die(mysql_error());

$x = 0;

while($row = mysql_fetch_array( $sql ))
{
    $imgname = $x.".jpg";

    $color = $row['value'];

    // Skip the whole lot if the colour is invalid
    if (strlen($color) != 6)
        continue;

    // No need to create an array just to call list()
    $r = hexdec($color[0].$color[1]);
    $g = hexdec($color[2].$color[3]);
    $b = hexdec($color[4].$color[5]);

    // There's no need to header() if you're writing to a file
    //header("Content-type: image/jpeg");
    $image = imagecreate( 720, 576 );
    $colour = imagecolorallocate($image, $r, $g, $b);

    // You don't actually fill the image with the colour
    imagefilledrectangle($image, 0, 0, 719, 575, $colour);

    imagejpeg($image, $imgname);
    imagedestroy($image);

    $x++;
}

使用RGB值从PHP和MySQL创建图像

0 个答案: