这是一份作业

素数

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<?php

for($l=2;$l<100;$l++){
    $M = $l;
    $f=1;
    for($i=2;$i<$M;$i++)
        if($M % $i == 0){
            $f = 0;
            break;
        }
    if ($f==1){
        echo $M."\n";
    }
}

五角星

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<?php
echo "\n\n";
for ( $i1 = 1; $i1 < 6; $i1++ )                    /*这是五角星的上面一个角*/
{
    for ( $j1 = 1; $j1 < 19 - $i1; $j1++ )
        printf( " " );
    for ( $k1 = 1; $k1 <= 2 * $i1 - 1; $k1++ )
        printf( "*" );
    printf( "\n" );
}

for ($i2 = 1; $i2 < 5; $i2++ )                    /*这是五角星的中间两个角*/
{
    for ( $j2 = 1; $j2 < 3 * $i2 - 3; $j2++ )
        printf( " " );
    for ( $k2 = 1; $k2 <= 42 - 6 * $i2; $k2++ )
        printf( "*" );
    printf( "\n" );
}

for ( $i3 = 1; $i3 < 3; $i3++ ) /*这是中间与下部相接的部分*/
{
    for ( $j3 = 1; $j3 < 12 - $i3; $j3++ )
        printf( " " );
    for ( $k3 = 1; $k3 <= 12 + 2 * $i3; $k3++ )
        printf( "*" );
    printf( "\n" );
}

for ( $i4 = 1; $i4 < 5; $i4++ ) /*这是五角星的下面两个角*/
{
    for ( $j4 = 1; $j4 < 10 - $i4; $j4++ )
        printf( " " );
    for ( $k4 = 1; $k4 <= 10 - 2 * $i4; $k4++ )
        printf( "*" );
    for ( $m4 = 1; $m4 < 6 * $i4 - 3; $m4++ )
        printf( " " );
    for ( $n4 = 1; $n4 <= 10 - 2 * $i4; $n4++ )
        printf( "*" );
    printf( "\n" );
}

?>

循环输出关联数组

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<?php
$shuzu = array
(    'xm' => 'zhiwei',    'ming' => 'zhiwei',    'aaa' => '6666');$jian = array_keys($shuzu);
echo $jian[1];for($i=0;$i<count($jian);$i++)
{    echo $jian[$i]."\n";}?>

新闻界面

显示界面

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<?php
<!--先输出每列标题-->
<!--再打开txt-->
<!--读取出数据后，使用函数进行分割。-->
<!--将分割完的存入数组-->
<!--再将数组中的数据，按照格式每行输出。-->
<!--列标题： 热度  标题   作者  发表时间  操作-->

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title><?php echo 'ICQ新闻震撼部';?></title>
</head>
<body background="tupian/bg.jpg">
<center><?php echo "ICQ新闻震撼部";?></center>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

<table>
    <tr>
        <th><button><?php echo "热度✍"; ?></button></th>
        <th><?php echo "标题"; ?></th>
        <th><?php echo "作者"; ?></th>
        <th><?php echo "发表时间"; ?></th>
        <th><?php echo "操作"; ?></th>
    </tr>
    <?php
    $f = fopen("news.db","r");
    $i=0;
    while(!feof($f)){
        $hang = fgets($f);
        $shuzu = explode("|",$hang);

        $redu = base64_decode($shuzu[0]);
        $biaoti = base64_decode($shuzu[1]);
        $zuozhe = base64_decode($shuzu[2]);
        $fashijian = base64_decode($shuzu[3]);
        $caozuo = base64_decode($shuzu[4]);
        $tupian = base64_decode($shuzu[5]);
        $jianjie = substr(base64_decode($shuzu[6]),"0","400");
       echo  <<<EOF
    <tr>
        <td align="center">$redu</td>
        <td align="center">$biaoti</td>
        <td align="center">$zuozhe</td>
        <td align="center">$fashijian</td>
        <td align="center">$caozuo</td>
    </tr>
EOF;
       if($i<3){
           echo <<<EOF
        <tr>
        <td>$tupian</td>
        <td colspan="4">$jianjie</tr>
EOF;
           $i++;
       }
    }
    ?>

</table>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
<center>版权所有  ICQ</center>
<center>©2019 ICQ 意见反馈 京ICP证030173号  京公网安备11000002000001号 </center>
</body>
</html>

上传前端

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<form action="jieshou.php" method="POST" accept-charset="utf-8" enctype="multipart/form-data">
        　　<div class="lsUpfindBtn">上传图片 <input type="file" name="file" id="file" /> </div>
    <input type="submit" value="点击上传">
</form>
</body>

上传后端

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$file = request()->file('file');
$info = $file->move(ROOT_PATH.'F:\Project\PHP\test\news_file\tupian');//图片保存路径 //储存到数据库
if(!$info){
    $this->error('图片上传失败');
}