从一个foreach循环动态地在PHP中为二维数组添加值 [英] Add values to a two dimensional array dynamically in PHP from a foreach loop

问题描述

 数组（[id0] => id [gd0] = 50％[q 0] => 1 [p 0] => 10 [t 0] => 10 [id1] => id [gd1] => 65％[q1] => 2 [p1 ] => 20 [t1] => 40 [id2] => id [gd2] => 90％[q2] => 2 [p2] => 510 [t2] => 1020） b $ b  

我想通过存储相同的值使它成为一个二维数组，像这样：数组（array（[id0] => id [gd0] => 50％[q0] => 1阵列（[id1] => id [gd1] => 65％[q1] => 2 [p1] => 20 [t1] => 40），array（[id2] => id [gd2] => 90％[q2] => 2 [p2] => 510 [t2] => 1020））

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。我已经尝试了一个foreach循环，但没有运气：

  $ 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）; 
  

然而，这是行不通的。 print_r（）仅显示 Array（）

解决方案您正在使用等号运算符 == 而不是赋值运算符 = in你的 else 语句。

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()

解决方案

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

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