php生成多个不重复的随机数实例程序

<?php
//range 是将1到100 列成一个数组
$numbers = range (1,100);
//shuffle 将数组顺序随即打乱
shuffle ($numbers);
//array_slice 取该数组中的某一段
$no=6;
$result = array_slice($numbers,0,$no);
for ($i=0;$i<$no;$i++){
echo $result[$i]."<br>";
}
print_r($result);
?>

//range 是将1到42 列成一个数组
$numbers = range (1,42);
//shuffle 将数组顺序随即打乱
shuffle ($numbers);
//array_slice 取该数组中的某一段
$result = array_slice($numbers,0,3);
print_r($result);

<?php
$numbers = range (1,20);
srand ((float)microtime()*1000000);
shuffle ($numbers);
while (list (, $number) = each ($numbers)) {
echo "$number ";
}
?>

<?php
function NoRand($begin=0,$end=20,$limit=5){
$rand_array=range($begin,$end);
shuffle($rand_array);//调用现成的数组随机排列函数
return array_slice($rand_array,0,$limit);//截取前$limit个
}
print_r(NoRand());
?>

<?php
$tmp=array();
while(count($tmp)<5){
$tmp[]=mt_rand(1,20);
$tmp=array_unique($tmp);
}
print join(',',$tmp);
?>

<?php
/*
* array unique_rand( int $min, int $max, int $num )
* 生成一定数量的不重复随机数
* $min 和 $max: 指定随机数的范围
* $num: 指定生成数量
*/
function unique_rand($min, $max, $num) {
    $count = 0;
    $return = array();
    while ($count < $num) {
        $return[] = mt_rand($min, $max);
        $return = array_flip(array_flip($return));
        $count = count($return);
    }
    shuffle($return);
    return $return;
}

$arr = unique_rand(1, 25, 16);
sort($arr);

$result = '';
for($i=0; $i < count($arr);$i++)
{
 $result .= $arr[$i].',';
}
$result = substr($result, 0, -1);
echo $result;
?>

程序运行如下：

1 2,3,4,6,7,8,9,10,11,12,13,16,20,21,22,24

Array (
 [0] => 0
 [1] => 1
 [2] => 2
 [3] => 3
 [4] => 4
 [5] => 5
 [6] => 6
 [7] => 7
 [8] => 8
 [9] => 9
 [10] => a
 [11] => b
 [12] => c
 [13] => d
 [14] => e
 [15] => f
 [16] => g
 [17] => h
 [18] => i
 [19] => j
 [20] => k
 [21] => l
 [22] => m
 [23] => n
 [24] => o
 [25] => p
 [26] => q
 [27] => r
 [28] => s
 [29] => t
 [30] => u
 [31] => v
 [32] => w
 [33] => x
 [34] => y
 [35] => z
)

<?php
// 生成0123456789abcdefghijklmnopqrstuvwxyz中的一个字符
function getOptions()
{
  $options = array();
  $result = array();
  for($i=48; $i<=57; $i++)
  {
      array_push($options,chr($i)); 
  }
  for($i=65; $i<=90; $i++)
   {
       $j = 32;
       $small = $i + $j;
       array_push($options,chr($small));
 }
  return $options;
}
/*
$e = getOptions();
for($j=0; $j<150; $j++)
{
 echo $e[$j];
}
*/
$len = 10;
// 随机生成数组索引，从而实现随机数
for($j=0; $j<100; $j++)
{
  $result = "";
  $options = getOptions();
  $lastIndex = 35;
  while (strlen($result)<$len)
  {
    // 从0到35中随机取一个作为索引
  $index = rand(0,$lastIndex);
  // 将随机数赋给变量 $chr
    $chr = $options[$index];
  // 随机数作为 $result 的一部分
    $result .= $chr;
    $lastIndex = $lastIndex-1;
  // 最后一个索引将不会参与下一次随机抽奖
    $options[$index] = $options[$lastIndex];
  }
  echo $result."n";
}
?>

function CsubStrPro($str, $start, $length, $charset = "utf-8", $suffix = false)
{
    if (function_exists ( "mb_substr" ))
        return mb_substr ( $str, $start, $length, $charset );

    $re ['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";
    $re ['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
    $re ['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
    $re ['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";
    preg_match_all ( $re [$charset], $str, $match );
    $slice = join ( "", array_slice ( $match [0], $start, $length ) );
    if ($suffix)
        return $slice . "…";

    return $slice;
}

 function subString_UTF8($str, $start, $lenth)
    {
        $len = strlen($str);
        $r = array();
        $n = 0;
        $m = 0;
        for($i = 0; $i < $len; $i++) {
            $x = substr($str, $i, 1);
            $a  = base_convert(ord($x), 10, 2);
            $a = substr('00000000'.$a, -8);
            if ($n < $start){
                if (substr($a, 0, 1) == 0) {
                }elseif (substr($a, 0, 3) == 110) {
                    $i += 1;
                }elseif (substr($a, 0, 4) == 1110) {
                    $i += 2;
                }
                $n++;
            }else{
                if (substr($a, 0, 1) == 0) {
                    $r[ ] = substr($str, $i, 1);
                }elseif (substr($a, 0, 3) == 110) {
                    $r[ ] = substr($str, $i, 2);
                    $i += 1;
                }elseif (substr($a, 0, 4) == 1110) {
                    $r[ ] = substr($str, $i, 3);
                    $i += 2;
                }else{
                    $r[ ] = '';
                }
                if (++$m >= $lenth){
                    break;
                }
            }
        }
        return $r;
    } // End subString_UTF8;
}// End String

<form id=”content” action=”hello.php” method=”post” target=”yframe” enctype=”multipart/form-data”>
<input type=”file” name=”tValue”>
<input type=”submit” value=”submit”>
<iframe name=”yframe” src=”hello.php” style=”border:none;”></iframe>
</form>
<input type=”text”>

<?php
//echo $_FILES["tValue"]["tmp_name"];
if(move_uploaded_file($_FILES["tValue"]["tmp_name"], “img/a.jpg”))
{
echo “<img src=’img/a.jpg’ width=’250px’height=’130px’>”;
}
?>

MyClass::model()->deleteAllByAttributes(array(
    'phone_number'=>$phoneNumber,
));

MyClass::model()->deleteAllByAttributes(array(),'`phone_number` = :phone_number',array(
    ':phone_number'=>$phoneNumber,
));

MyClass::model()->deleteAll('`phone_number` = :phone_number',array(
    ':phone_number'=>$phoneNumber,
));

$condition = new CDbCriteria();
$condition->addCondition('status=:status');
$condition->params = array(':status'=>1);
$condition->addInCondition('user_id',array(100111,100221,100221));
User::model()->deleteAll($condition);Dao带in条件的示例

Yii::app()->db->createCommand()
->delete('mw_user', array('and', 'user_id=:user_id', array('in', 'position_id', array(1,2,3))),array(':user_id'=>121111));

<?php
include_once “config/config_global.php”;
include_once “config/config_ucenter.php”;
include_once “uc_client/client.php”;
echo uc_user_synlogin(2); //1为用户的ID

?>
<script type=”text/javascript”>
var obj=document.getElementsByTagName(“script”);
for(var i=0;i<obj.length-1;i++) {
document.write(“<a href=”"+obj[i].src+””>”+obj[i].src+”</a><hr>”);
}
</script>