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php使用GD实现颜色渐变实例,phpgd渐变实例

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Release: 2016-06-13 09:02:43
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php使用GD实现颜色渐变实例,phpgd渐变实例

本文实例讲述了php使用GD实现颜色渐变的方法。分享给大家供大家参考。具体实现方法如下:

<&#63;php
$im = imagecreate(255, 255);
$bg = imagecolorallocate($im, 0, 0, 0);
for ($i = 255; $i >= 0; $i--) {
    $color = imagecolorallocate($im, $i, $i, $i);
    imagefilledrectangle($im, 0, $i, 255, 1, $color);
}
header("Content-type: image/png");
imagepng($im);
imagedestroy($im);
&#63;>
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效果图如下:

希望本文所述对大家的php程序设计有所帮助。

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