$学习帖="非文学帖";

//很好玩的代码。复制————新建php文件 粘贴 保存 动动小手就可以看到代码运行效果了

<?php
$background=$_POST['u'];
?>
<form action="#" method="post">
<?php
for($r=0;$r<256;$r=$r+51){
for($g=0;$g<=256;$g=$g+51){
for($b=0;$b<=256;$b=$b+51){
$q=$r;
$w=$g;
$e=$b;
$q=str_pad(dechex($q),2,"0",STR_PAD_LEFT);
$w=str_pad(dechex($w),2,"0",STR_PAD_LEFT);
$e=str_pad(dechex($e),2,"0",STR_PAD_LEFT);
?>
<input type="submit" name="u" style="background:#<?php echo $q.$w.$e; ?>; color:#<?php echo $q.$w.$e; ?>;" value="<?php echo $q.$w.$e; ?>">
<?php

}
}
echo '<br>';
}
?>
</form>
<style >
input{
border:0px;
width:15px;
height:15px;
}
body{
background:#<?php echo $background;?>;
}
</style>