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tag: RELEASE_3_4_4
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<?php
header('Content-Type: image/svg+xml');
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 3600) . ' GMT');
function get_color($get_name, $default)
{
// get color from GET args, only alphanumeric chcracters
$opts = array('options' => array('regexp' => '/^[a-z0-9]+$/i'));
$color = filter_input(INPUT_GET, $get_name, FILTER_VALIDATE_REGEXP, $opts);
if (preg_match('/^[a-f0-9]{6}$/', $color)) {
return '#' . $color;
}
return $color ? $color : $default;
}
?>
<?php echo '<?xml version="1.0" ?>' ?>
<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none" version="1.0" width="100%" height="100%">
<defs>
<linearGradient id="linear-gradient" x1="0%" y1="0%" x2="0%" y2="100%">
<stop offset="0%" stop-color="<?php echo get_color('from', 'white') ?>" stop-opacity="1" />
<stop offset="100%" stop-color="<?php echo get_color('to', 'black') ?>" stop-opacity="1" />
</linearGradient>
</defs>
<rect width="100%" height="100%" style="fill:url(#linear-gradient);" />
</svg>
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