Question

我有以下数组。请忽略语法，因为我将其复制为源代码。

<?php
$rowData = Array
(


[1] = Array
    (
        [0] = Buffalo
        [1] = Tampa Bay
        [2] = -7
        [3] = favorite
        [4] = 0
        [5] = 46
    )

[2] = Array
    (
        [0] = Minnesota
        [1] = Tennessee
        [2] = 3
        [3] = favorite
        [4] = 1
        [5] = 33
    )

[3] = Array
    (
        [0] = Green Bay
        [1] = Cincinnati
        [2] = 3
        [3] = favorite
        [4] = 1
        [5] = 33
    )

[4] = Array
    (
        [0] = Jacksonville
        [1] = Buffalo
        [2] = 4
        [3] = underdog
        [4] = 1
        [5] = 54
    )

);
?>

我想要做的是遍历每个数组，如果[4]条目= 1，则对该数组执行一个函数，如果[4]条目= 0，则执行不同的函数。我不知道如何在循环中识别每一个..

foreach ($rowData as $row => $tr) 
{
  //if [4] is equal to 1
  if()
  {

  }
  //if [4] is equal to 0
  elseif()
  {

  }

}

Answer 1

如果要在$rowData的子数组上执行某些功能，以便在循环完成后获得更新版本，则需要执行以下操作：

echo '<pre>',print_r($rowData),'</pre>';

foreach ($rowData as &$tr) // the & sign will pass the sub array $tr as a reference
{
  //if [4] is equal to 1
  if($tr[4] == 0)
  {
      execute_function1($tr);
  }
  //if [4] is equal to 0
  elseif($tr[4] == 0)
  {
      execute_function2($tr);
  }
}

// again you need to pass the sub array as a reference in order to make sure that the functionality you are going to apply to the $tr in the following functions will be also applied to the respective $tr of the $rowData array
execute_function1(&$tr){ .. };

execute_function2(&$tr){ .. };

echo '<pre>',print_r($rowData),'</pre>';

我曾经使用echo语句（一个在循环之前，一个在之后），因此您可以看到$rowData数组的变化情况。

Answer 2

试试这个：

foreach($rowData as $array)
{
    if($array[4] == 1)
       //some action
    else
       //another ction
}

Answer 3

你可以这样做，但不要忘记测试$ tr [4]是否存在：

    foreach ($rowData as $row => $tr) 
    {
       //Test if the key 4 exists 
       if(isset($tr[4])) {
          //Switch value
          switch($tr[4]) {
              case 1:
                  //Do action...
              break;
              case 0:
                  //Do action...
              break;
              default:
                  //Do nothing...
              break;
           }
        }
    }

循环遍历多维数组php

3 个答案: