40 lines
1.2 KiB
PHP
40 lines
1.2 KiB
PHP
<?php
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/*****************************************************************************
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IP Reg, a PHP/MySQL IPAM tool
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Copyright (C) 2007-2009 Wietse Warendorff (up to v0.5)
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Copyright (C) 2011-2023 Thomas Hooge
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SPDX-License-Identifier: GPL-3.0-or-later
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*****************************************************************************/
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include('config.php');
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session_name($config_app_session);
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session_start();
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function valid_color($color, $default='888888') {
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// safe return a 6 character color string in uppercase
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// input can be length of 3 or 6
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if (! isset($color) or ! ctype_xdigit($color)) {
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return $default;
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}
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if(strlen($color) == 3) {
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// duplicate characters
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$col6 = '';
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for ($i=1; $i<=3; $i++) {
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$col6 .= $color[$i].$color[$i];
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}
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return strtoupper($col6);
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}
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return strtoupper($color);
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}
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$color = valid_color($_GET['color'], '444');
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$image = imagecreatetruecolor($_SESSION['suser_imagesize'], $_SESSION['suser_imagesize']);
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$color = imagecolorallocate($image, hexdec(substr($color,0,2)), hexdec(substr($color,2,2)), hexdec(substr($color,4,2)));
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imagefill($image, 0, 0, $color);
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header('Content-type: image/png');
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imagepng($image);
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imagedestroy($image);
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