使用foreach循环在PHP中动态地向二维数组添加值[关闭]

问题描述：

I have the following array coming from a form submission:

 Array ( [id0] => id [gd0] => 50% [q0] => 1 [p0] => 10 [t0] => 10 [id1] => id [gd1] => 65%     [q1] => 2 [p1] => 20 [t1] => 40 [id2] => id [gd2] => 90% [q2] => 2 [p2] => 510 [t2] => 1020 )

I want to make it a two dimensional array by storing the same values, in a new pattern like so:

Array (array([id0] => id [gd0] => 50% [q0] => 1 [p0] => 10 [t0] => 10 ) , array([id1] => id [gd1] => 65% [q1] => 2 [p1] => 20 [t1] => 40 ) , array([id2] => id [gd2] => 90% [q2] => 2 [p2] => 510 [t2] => 1020))

Thus I'm trying to rearrange the similar information in a new dimension in an another array. I have tried a foreach loop, but with no luck:

 $items = array();
                $X = -1; // the index of the first dimension
                $Y = 0; // the second index


 foreach ($_POST as $val) {


                    if ($val == 'id') {

                        $X++;
                        $Y = 0;
                    } else {

                        $items[$X][$Y] == $val;

                        // increment the second index to prevent overwriting

                        $Y++;
                    }
                }

                print_r($items);

However, it is not working. print_r() displays only Array()

我有来自表单提交的以下数组： p>

 数组（[id0] =＆gt; id [gd0] =＆gt; 50％[q0] =＆gt; 1 [p0] =＆gt; 10 [t0] =＆gt; 10 [id1] =＆gt; id [gd1] =  ＆gt; 65％[q1] =＆gt; 2 [p1] =＆gt; 20 [t1] =＆gt; 40 [id2] =＆gt; id [gd2] =＆gt; 90％[q2] =＆gt; 2 [p2]  =＆gt; 510 [t2] =＆gt; 1020）
  code>  pre> 
 
 我希望通过以相同的新模式存储相同的值来使其成为二维数组 ： p> 
 
 
 数组（数组（[id0] =＆gt; id [gd0] =＆gt; 50％[q0] =＆gt; 1 [p0] =＆gt; 10 [t0  ] =＆gt; 10），数组（[id1] =＆gt; id [gd1] =＆gt; 65％[q1] =＆gt; 2 [p1] =＆gt; 20 [t1] =＆gt; 40），数组（[]  id2] =＆gt; id [gd2] =＆gt; 90％[q2] =＆gt; 2 [p2] =＆gt; 510 [t2] =＆gt; 1020））
  code>  pre> 
 \  n 因此，我试图在另一个数组中重新排列新维度中的类似信息。 我尝试了一个foreach循环，但没有运气： p> 
 
 
  $ items = array（）; 
 $ X = -1;  //第一维的索引
 $ Y = 0;  //第二个索引
 
 
 foreach（$ _POST as $ val）{
 
 
 if（$ val =='id'）{
 
 $ X ++; 
 $ Y = 0  ; 
} else {
 
 $ items [$ X] [$ Y] == $ val; 
 
 //增加第二个索引以防止覆盖
 
 $ Y ++; 
} 
  } 
 
 print_r（$ items）; 
  code>  pre> 
 
 但是，它不起作用。   print_r（） code>仅显示 Array（） code>  p> 
  div>

答

You are using the equality operator == rather than the assignment operator = in your else statement.

答

I assume you are having some kind of array input in your form submission. If so you can try to to name the fields like this. It will give you a two dimensional array directly in the $_POST variable.

<input type="text" name="data[0][id]" />
<input type="text" name="data[0][gd]" />
<input type="text" name="data[0][q]" />
<input type="text" name="data[0][p]" />
<input type="text" name="data[0][t]" />

<input type="text" name="data[1][id]" />
<input type="text" name="data[1][gd]" />
<input type="text" name="data[1][q]" />
<input type="text" name="data[1][p]" />
<input type="text" name="data[1][t]" />

<input type="text" name="data[2][id]" />
<input type="text" name="data[2][gd]" />
<input type="text" name="data[2][q]" />
<input type="text" name="data[2][p]" />
<input type="text" name="data[2][t]" />

The $_POST array will look something like:

array(
  "data" => array(
    0 => array("id" => "value", "gd" => "value" ... ),
    1 => array("id" => "value", "gd" => "value" ... ),
    2 => array("id" => "value", "gd" => "value" ... ),
  )
)

使用foreach循环在PHP中动态地向二维数组添加值[关闭]

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