在foreach中解析foreach

Question

我有一些问题，我需要指导。我试图解析3个CSV文件，并把它们放入一个foreach循环，但它的可怕性是错误的。字符串$ stockClose不会改变它仍然是相同的，通过了循环，$ nas_stock变化，每20环，它是想改变每一个循环中，这似乎是正常工作的仅$ sp500_stock，即时通讯不知道为什么

$currentMonth = date('n'); 
    $currentMonth = $currentMonth - 1; 
    $prevcurrentMonth = date('n'); 
    $prevcurrentMonth = $prevcurrentMonth - 2; 
    $currentDay = date('j'); 
    $lastDay = $currentDay - 6; 
    $currentYear = date('Y'); 

    $filedow = file_get_contents("http://ichart.finance.yahoo.com/table.csv?s=%5EDJI&a=$prevcurrentMonth&b=$lastDay&c=$currentYear&d=$currentMonth&e=$currentDay&f=$currentYear&g=d&ignore=.csv"); 

    $filenas = file_get_contents("http://ichart.finance.yahoo.com/table.csv?s=%5EIXIC&a=$prevcurrentMonth&b=$lastDay&c=$currentYear&d=$currentMonth&e=$currentDay&f=$currentYear&g=d&ignore=.csv"); 

    $filesp500 = file_get_contents("http://ichart.finance.yahoo.com/table.csv?s=%5EGSPC&a=$prevcurrentMonth&b=$lastDay&c=$currentYear&d=$currentMonth&e=$currentDay&f=$currentYear&g=d&ignore=.csv"); 

    $stockcontent = str_replace('Date,Open,High,Low,Close,Volume,Adj Close', '', $filedow); 
    $stockcontent = trim($stockcontent); 

$stockcontentex = str_getcsv($stockcontent, "\n"); 

    $stocknas = str_replace('Date,Open,High,Low,Close,Volume,Adj Close', '', $filenas); 
    $stocknas = trim($stocknas); 
$stocknasex = str_getcsv($stocknas, "\n"); 

    $stocksp500 = str_replace('Date,Open,High,Low,Close,Volume,Adj Close', '', $filesp500); 
    $stocksp500 = trim($stocksp500); 
$stocksp500ex = str_getcsv($stocksp500, "\n"); 

    $i = 0; 
    $j = 0; 

    $_str = ''; 
    $_str .= "<script type='text/javascript'> 
    google.load('visualization', '1', {packages: ['annotatedtimeline']}); 
function drawVisualization() { 
    var data = new google.visualization.DataTable(); 
    data.addColumn('date', 'Date'); 
    data.addColumn('number', 'Dow Jones'); 
    data.addColumn('number', 'Nasdaq'); 
    data.addColumn('number', 'S&P 500'); 
    data.addRows(["; 
    $tstr = ""; 
     $_str = ''; 
$_str .= "<script type='text/javascript'> 
    google.load('visualization', '1', {packages: ['annotatedtimeline']}); 
function drawVisualization() { 
    var data = new google.visualization.DataTable(); 
    data.addColumn('date', 'Date'); 
    data.addColumn('number', 'Dow Jones'); 
    data.addColumn('number', 'Nasdaq'); 
    data.addColumn('number', 'S&P 500'); 
    data.addRows(["; 
    $tstr = ""; 
     foreach($stocknasex as $nas){ 
      $nasex = explode(',',$nas); 
       $nas_stock = $nasex[4]; 
     } 

     foreach($stocksp500ex as $sp500){ 
      $sp500ex = explode(',',$sp500); 
       $sp500_stock = $sp500ex[4]; 
     } 
     foreach($stockcontentex as $stockexplode){ 
     $stockex = explode(',',$stockexplode); 
     $stockexdate = explode('-', $stockex[0]); 
     $stockYear = $stockexdate[0]; 
     $stockMonth = $stockexdate[1] - 1 ; 
     $stockDay = $stockexdate[2]; 
     $stockHigh = $stockex[2]; 
     $stockLow = $stockex[3]; 
     $stockClose = $stockex[4]; 




    } 

    for($i=0; $i<=30; $i++){ 
    $tstr = '[new Date('.$stockYear.', '.$stockMonth.', '.$stockDay.'), '.$stockClose.', '.$nas_stock.', '.$sp500_stock.'],'. "\n".$tstr; 
    } 
    $_str = $_str.$tstr; 
    $_str .= "]); 
    var annotatedtimeline = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_div')); 
      annotatedtimeline.draw(data, { 
          //'allValuesSuffix': '%', // A suffix that is added to all values 
          'colors': ['#12577F', '#769422', '#999999'], // The colors to be used 
          'displayAnnotations': true, 
          'displayExactValues': true, // Do not truncate values (i.e. using K suffix) 
          'displayRangeSelector' : false, // Do not sow the range selector 
          'displayZoomButtons': true, // DO not display the zoom buttons 
          'legendPosition': 'newRow', // Can be sameRow 
          //'max': 600, // Override the automatic default 
          //'min': 500, // Override the automatic default 
          'scaleColumns': [0, 1], // Have two scales, by the first and second lines 
          'scaleType': 'allmaximized', // See docs... 
          'thickness': 2, // Make the lines thicker 
           }); 
    } 
      google.setOnLoadCallback(drawVisualization); 

</script><div style='float:left; border:1px solid #ccc;'> 
<div id='chart_div' style='width: 500px; height: 230px;'></div></div>"; 

    return $_str; 
    break; 

    } 

Answer 1

你到底想干什么？你有嵌套循环。整个$sp500循环是$nas循环体，这意味着$nas不会重复，直到$sp500去，一路过关斩将的$stocksp500ex的第一个值内。而$nas循环，反过来，完全在$stockexplode循环，这意味着$stockexplode不会前进，直到$nas已经走过了$stocknasex一路的本体中。

它们就像一个计数器位数。最内层的循环是最右边的数字，下一个循环不会点击，直到内层翻转。

编辑： 如果你想在并行三个阵列迭代，你应该使用一个循环，而不是三个嵌套的。也许这样？

$nasex_count = count($stocknasex); 
    $sp500_count = count($stocksp500ex); 
    $content_count = count($stockcontentex); 
    $max = max($nasex_count, $sp500_count, $content_count); 

    for ($i = 0; $i < $max; ++$i) { 
    if ($i < $nasex_count) { 
     ... do something with $stocknasex[$i] ... 
    } 

    if ($i < $sp500_count) { 
     ... do something with $stocksp500ex[$i] ... 
    } 

    if ($i < $content_count) { 
     ... do something with $stockcontentex[$i] ... 
    } 
    } 

当然，如果你知道要在所有三个数组的大小相同，则可以跳过max()和条件。