PHP-输出随机数

 

  
<?php
echo "欢迎您和我们一起学习PHP！";
echo "<hr color='#FF00FF' />";

//第一种方法

$numbers = range (0,100);
shuffle ($numbers);
//array_slice 取该数组中的某一段
echo "排序前：";
$no=20;
$result = array_slice($numbers,0,$no);

for ($i=0;$i<$no;$i++){
    echo "<font color='#0000BB'>".$result[$i]."</font>"."\n";
}
echo "<br />";
echo "排序后：";
sort ($result);
//echo "<font color='#FF0000'>".join (' ',$result)."</font>";
for ($w=0;$w<$no;$w++){
 echo "<font color='#FF0000'>".$result[$w]."</font>"."\n";
}
echo"<hr />";

//第二种方法

$tmp=array();
while(count($tmp)<20){
$tmp[]=mt_rand(0,100);
$tmp=array_unique($tmp);
}
echo "排序前：";
echo join(',',$tmp);
echo "<br>";
echo "排序后：" ;
sort($tmp);
echo implode(',',$tmp);
?>