Question

我正在尝试循环访问某些CSV数据并取出$ data [4]项。我最终的目标是找到平均值，并希望使用PHP的array_sum。这似乎是有效的，除了每次我尝试创建这个数组时，我的while循环将每个值分成它们各自独立的数组（$ real），而不是我可以使用的一个数组。我已经尝试了所有的东西，包括在循环之外使用数组，但没有任何工作。任何帮助将不胜感激！

    $symbol=array("XOM","CVX","RDS-A",
                 "PTR","TOT","SNP","COP",
                 "IMO","BP","E","STO","EC","SU","MRO");
    for($i=0; $i<count($symbol);$i++)
    {
        $handle = @fopen("http://ichart.yahoo.com/table.csv?s={$symbol[$i]}&a=10&b=12&c=2013&d=10&e=12&f=2013&g=d&ignore=.csv", "r", false, $context);
        if ($handle === false)
        {
            // trigger (big, orange) error
            trigger_error("Could not connect to Yahoo!", E_USER_ERROR);
            exit;
        }

        // download title of CSV file and throw away
        $data=fgetcsv($handle);

        //loop through data
        while(($data = fgetcsv($handle)) !==FALSE)

        {

            $rows++;
            $num=count($data);
            $real=array($data[4]);



        }
            var_dump($real);

    }

这是我的最终结果：

array(1) { [0]=> string(9) "92.669998" } 
array(1) { [0]=> string(6) "120.00" } 
array(1) { [0]=> string(9) "66.290001" } 
array(1) { [0]=> string(10) "111.059998" } 
array(1) { [0]=> string(5) "58.73" } 
array(1) { [0]=> string(9) "82.449997" } 
array(1) { [0]=> string(5) "72.82" } 
array(1) { [0]=> string(9) "42.740002" } 
array(1) { [0]=> string(5) "45.91" } 
array(1) { [0]=> string(5) "47.98" } 
array(1) { [0]=> string(9) "22.440001" } 
array(1) { [0]=> string(5) "41.93" } 
array(1) { [0]=> string(5) "34.82" } 
array(1) { [0]=> string(5) "35.82" }

Answer 1

不确定$context是什么，但试试这个......

$symbol=array("XOM","CVX","RDS-A","PTR","TOT","SNP","COP","IMO","BP","E","STO","EC","SU","MRO");
$datas = array();
for($i=0; $i<count($symbol);$i++){
    $handle = @fopen("http://ichart.yahoo.com/table.csv?s={$symbol[$i]}&a=10&b=12&c=2013&d=10&e=12&f=2013&g=d&ignore=.csv", "r", false, $context);
    if ($handle === false){
        // trigger (big, orange) error
        trigger_error("Could not connect to Yahoo!", E_USER_ERROR);
        exit;
    }

    // download title of CSV file and throw away
    $data=fgetcsv($handle);

    //loop through data
    while(($data = fgetcsv($handle)) !==FALSE){
        $rows++;
        $datas[] = $data[4];
    }
}

print_r($datas);

PHP while循环和数组

1 个答案: