更改子数组

时间：2018-03-03 21:41:50

标签： php arrays

这个程序需要一堆NFL球员的统计数据，计算他们的传球率然后显示所有信息。它大部分都已完成，但我在几个不同的领域遇到了麻烦。      

$rate = "";
$file = 'purposely took the file location out';
$fp = fopen($file, 'r');
$name = "";
$team = "";
$completions = "";
$attempts = "";
$yards = "";
$touchdowns = "";
$interceptions = "";

function getNflStats($file){
@ $fp = fopen($file, 'r');


if(!$fp){
    echo "Could not open the file!<br/>";
    exit;
}

$nflStats = array();

while($data = fgetcsv($fp,255,',')){
    $name = $data[0];
    $team = $data[1];
    $completions = $data[2];
    $attempts = $data[3];
    $yards = $data[4];
    $touchdowns = $data[5];
    $interceptions = $data[6];
    $rate = Calculate($completions, $attempts, $yards, $touchdowns, 
    $interceptions);
    $nflStats[] = array("name"=>$rate);
}
fclose($fp);
return $nflStats;
}

如何更改子数组中的值？在calculate函数中，我创建了一个包含所有计算值的数组。通过大量尝试，我发现由于while循环，每个值$ a，$ b，$ c和$ d都是它自己的数组。我正在尝试检查任何子阵列中的任何值是否高于2.375或低于0，如果是，我会将该值更改为2.375或0.我已经在这3小时工作但是已经尚未找到解决方法，了解如何遍历每个子阵列并更改每个子元素。

function Calculate($completions, $attempts, $yards, $touchdowns, 
$interceptions){
$a = ($completions/$attempts - .3) * 5;
$b = ($yards/$attempts - 3) * .25;
$c = ($touchdowns/$attempts) * 20;
$d = (2.375 - ($interceptions/$attempts *25));

$result = array($a,$b,$c,$d);
echo "$result[0] <br/>";
$size = count($result[0]);
foreach($result as $value){
  for($i=0;$i < $size; $i++){
    if($result[i] > 2.375){
            $result[i] = 2.375;
    }
  }
}
$passRating = round((($a + $b + $c + $d)/6) * 100, 2);

return $passRating;
}

我在查看球员名字时也遇到了麻烦，他们正在通过率。我只能同时制作一个或另一个，但不能同时制作。我不确定它是我的数组格式化还是foreach循环的问题。

function displayStats($nflStats){

    asort($nflStats);

    echo "<table>";
    echo "<thead><tr>
       <td><h2>Player</h2></td>
       <td></td>
       <td><h2>Rating</h2></td>
       </tr></thead>";

    foreach($nflStats as $stats){
        echo "<tr>
            <td>{$stats['name']}</td>
            <td></td>
            <td style='text-align:right'></td>
          </tr>";
    }

    echo "</table>";
}

displayStats($nflStats);
?>

以下是我正在从文件中读取的一些数据：

Tom Brady,NE,385,581,4577,32,8
Philip Rivers,LAC,360,575,4515,28,10
Matthew Stafford,DET,371,565,4446,29,10
Drew Brees,NO,386,536,4334,23,8
Ben Roethlisberger,PIT,360,561,4251,28,14
Matt Ryan,ATL,342,529,4095,20,12
Kirk Cousins,WAS,347,540,4093,27,13
Alex Smith,KC,341,505,4042,26,5
Russell Wilson,SEA,339,553,3983,34,11
Jared Goff,LA,296,477,3804,28,7
Blake Bortles,JAX,315,523,3687,21,13
Case Keenum,MIN,325,481,3547,22,7
Jameis Winston,TB,282,442,3504,19,11
Derek Carr,OAK,323,515,3496,22,13
Eli Manning,NYG,352,571,3468,19,13
Dak Prescott,DAL,308,490,3324,22,13
Andy Dalton,CIN,297,496,3320,25,12
Cam Newton,CAR,291,492,3302,22,16
Carson Wentz,PHI,265,440,3296,33,7
Marcus Mariota,TEN,281,453,3232,13,15
Joe Flacco,BAL,352,549,3141,18,13
Jacoby Brissett,IND,276,469,3098,13,7
Josh McCown,NYJ,267,397,2926,18,9

目前我收到一些关于变量i或只显示值的错误：

值的样本:(试图让它们不是负数或超过~158）

-12.8
-11.25
27.08
31.25
31.77
35.42
46.65
55.06
55.85
60.5
63.39
65.79
66.39
68.15
69.23
70.6
71.44
71.92
71.92
71.99
72.34
72.47
72.53
73.3
75.61
76.37
76.88
77.5 172.92
206.25
214.58
254.17
268.75
577.08
631.25

1 个答案:

答案 0 :(得分：0)

你忘了把美元符号放在i的前面几个地方，但我大部分都重写了你的代码，试图为你精简它。 asort()正在命令ASC并保留密钥 - 但您不需要保留密钥。如果您希望使用我的新usort()方法进行ASC排序，只需撤消太空船运营商（$a）两侧的$b和<=>变量。

代码：（Demo）

$csv=<<<CSV
Tom Brady,NE,385,581,4577,32,8
Philip Rivers,LAC,360,575,4515,28,10
Matthew Stafford,DET,371,565,4446,29,10
Drew Brees,NO,386,536,4334,23,8
Ben Roethlisberger,PIT,360,561,4251,28,14
Matt Ryan,ATL,342,529,4095,20,12
Kirk Cousins,WAS,347,540,4093,27,13
Alex Smith,KC,341,505,4042,26,5
Russell Wilson,SEA,339,553,3983,34,11
Jared Goff,LA,296,477,3804,28,7
Blake Bortles,JAX,315,523,3687,21,13
Case Keenum,MIN,325,481,3547,22,7
Jameis Winston,TB,282,442,3504,19,11
Derek Carr,OAK,323,515,3496,22,13
Eli Manning,NYG,352,571,3468,19,13
Dak Prescott,DAL,308,490,3324,22,13
Andy Dalton,CIN,297,496,3320,25,12
Cam Newton,CAR,291,492,3302,22,16
Carson Wentz,PHI,265,440,3296,33,7
Marcus Mariota,TEN,281,453,3232,13,15
Joe Flacco,BAL,352,549,3141,18,13
Jacoby Brissett,IND,276,469,3098,13,7
Josh McCown,NYJ,267,397,2926,18,9
CSV;

function Calculate($completions, $attempts, $yards, $touchdowns, $interceptions){
    $result=[
        min(2.375, ($completions/$attempts - .3) * 5),
        min(2.375, ($yards/$attempts - 3) * .25),
        min(2.375, $touchdowns/$attempts * 20),
        min(2.375, 2.375 - ($interceptions/$attempts *25))
    ];
    // min() will ensure that no value will exceed 2.375 (avoiding looped conditional entirely)
    return round(array_sum($result)/6*100, 2);  // calculated passingRate
}

// foreach()...explode()...str_csv() is just for demo'ing purposes, you can use your existing process
foreach(explode("\n",$csv) as $line){
    list($name,$team,$completions,$attempts,$yards,$touchdowns,$interceptions)=str_getcsv($line,",");
    $NFL_Stats[]=['team'=>$team,'name'=>$name,'passingRate'=>Calculate($completions, $attempts, $yards, $touchdowns, $interceptions)];
}
usort($NFL_Stats,function($a,$b){return $b['passingRate']<=>$a['passingRate'];});  // order by passingRate DESC
var_export($NFL_Stats);

输出：

array (
  0 => 
  array (
    'team' => 'KC',
    'name' => 'Alex Smith',
    'passingRate' => 104.74,
  ),
  1 => 
  array (
    'team' => 'NO',
    'name' => 'Drew Brees',
    'passingRate' => 103.87,
  ),
  2 => 
  array (
    'team' => 'NE',
    'name' => 'Tom Brady',
    'passingRate' => 102.75,
  ),
  3 => 
  array (
    'team' => 'PHI',
    'name' => 'Carson Wentz',
    'passingRate' => 101.86,
  ),
  4 => 
  array (
    'team' => 'LA',
    'name' => 'Jared Goff',
    'passingRate' => 100.48,
  ),
  5 => 
  array (
    'team' => 'DET',
    'name' => 'Matthew Stafford',
    'passingRate' => 99.33,
  ),
  6 => 
  array (
    'team' => 'MIN',
    'name' => 'Case Keenum',
    'passingRate' => 98.3,
  ),
  7 => 
  array (
    'team' => 'LAC',
    'name' => 'Philip Rivers',
    'passingRate' => 95.96,
  ),
  8 => 
  array (
    'team' => 'SEA',
    'name' => 'Russell Wilson',
    'passingRate' => 95.39,
  ),
  9 => 
  array (
    'team' => 'NYJ',
    'name' => 'Josh McCown',
    'passingRate' => 94.51,
  ),
  10 => 
  array (
    'team' => 'WAS',
    'name' => 'Kirk Cousins',
    'passingRate' => 93.85,
  ),
  11 => 
  array (
    'team' => 'PIT',
    'name' => 'Ben Roethlisberger',
    'passingRate' => 93.37,
  ),
  12 => 
  array (
    'team' => 'TB',
    'name' => 'Jameis Winston',
    'passingRate' => 92.24,
  ),
  13 => 
  array (
    'team' => 'ATL',
    'name' => 'Matt Ryan',
    'passingRate' => 91.36,
  ),
  14 => 
  array (
    'team' => 'DAL',
    'name' => 'Dak Prescott',
    'passingRate' => 86.64,
  ),
  15 => 
  array (
    'team' => 'CIN',
    'name' => 'Andy Dalton',
    'passingRate' => 86.59,
  ),
  16 => 
  array (
    'team' => 'OAK',
    'name' => 'Derek Carr',
    'passingRate' => 86.36,
  ),
  17 => 
  array (
    'team' => 'JAX',
    'name' => 'Blake Bortles',
    'passingRate' => 84.68,
  ),
  18 => 
  array (
    'team' => 'IND',
    'name' => 'Jacoby Brissett',
    'passingRate' => 81.67,
  ),
  19 => 
  array (
    'team' => 'CAR',
    'name' => 'Cam Newton',
    'passingRate' => 80.69,
  ),
  20 => 
  array (
    'team' => 'BAL',
    'name' => 'Joe Flacco',
    'passingRate' => 80.42,
  ),
  21 => 
  array (
    'team' => 'NYG',
    'name' => 'Eli Manning',
    'passingRate' => 80.37,
  ),
  22 => 
  array (
    'team' => 'TEN',
    'name' => 'Marcus Mariota',
    'passingRate' => 79.27,
  ),
)
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