我是新手刚学PHP的学过一点VB
求大神指点那里有错误
以下是我写的代码
<?php

for($a=0;$a<=5;$a++)
{
$b[$a]=rand(1,10);
echo $b[$a]."<br>";
        }


echo "--------分界线----<br>";

for($c=0;$c<=5;$c++)
{
        for($d=0;$d<=$c;$d++)
        {
         if($b[$d]>$b[$d+1])
                {
                        $z=$b[$d];
                        $b[$d]=$b[$d+1];
                        $b[$d+1]=$z;
                        }
                        
        
                }

        }







for($g=0;$g<=5;$g++)
{

echo $b[$g]."<br>";
        }
?>