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PHP foreach循环通过多维数组输出按一个键->值分组

[英]PHP foreach loop through multidimensional array output group by one key->value

 原文  2019-02-04 21:40:27  9   3    php/ arrays/ multidimensional-array/ foreach

问题描述

I have the following array with day and totalprice: 我有以下数组与天和总价： 

Array ( 
[0] => Array ( [day] => 01/08/2019 [totalprice] => 585.00 ) 
[1] => Array ( [day] => 02/08/2019 [totalprice] => 585.00 ) 
[2] => Array ( [day] => 03/08/2019 [totalprice] => 585.00 ) 
[3] => Array ( [day] => 04/08/2019 [totalprice] => 585.00 ) 
[4] => Array ( [day] => 05/08/2019 [totalprice] => 585.00 ) 
[5] => Array ( [day] => 06/08/2019 [totalprice] => 585.00 ) 
[6] => Array ( [day] => 07/08/2019 [totalprice] => 585.00 ) 
[7] => Array ( [day] => 08/08/2019 [totalprice] => 585.00 ) 
[8] => Array ( [day] => 09/08/2019 [totalprice] => 585.00 ) 
[9] => Array ( [day] => 10/08/2019 [totalprice] => 585.00 ) 
[10] => Array ( [day] => 11/08/2019 [totalprice] => 585.00 ) 
[11] => Array ( [day] => 12/08/2019 [totalprice] => 585.00 ) 
[12] => Array ( [day] => 13/08/2019 [totalprice] => 585.00 ) 
[13] => Array ( [day] => 14/08/2019 [totalprice] => 585.00 ) 
[14] => Array ( [day] => 15/08/2019 [totalprice] => 585.00 ) 
[15] => Array ( [day] => 16/08/2019 [totalprice] => 585.00 ) 
[16] => Array ( [day] => 17/08/2019 [totalprice] => 585.00 ) 
[17] => Array ( [day] => 18/08/2019 [totalprice] => 585.00 ) 
[18] => Array ( [day] => 19/08/2019 [totalprice] => 585.00 ) 
[19] => Array ( [day] => 20/08/2019 [totalprice] => 585.00 ) 
[20] => Array ( [day] => 21/08/2019 [totalprice] => 585.00 ) 
[21] => Array ( [day] => 22/08/2019 [totalprice] => 585.00 ) 
[22] => Array ( [day] => 23/08/2019 [totalprice] => 585.00 ) 
[23] => Array ( [day] => 24/08/2019 [totalprice] => 585.00 ) 
[24] => Array ( [day] => 25/08/2019 [totalprice] => 585.00 ) 
[25] => Array ( [day] => 26/08/2019 [totalprice] => 585.00 ) 
[26] => Array ( [day] => 27/08/2019 [totalprice] => 585.00 ) 
[27] => Array ( [day] => 28/08/2019 [totalprice] => 585.00 ) 
[28] => Array ( [day] => 29/08/2019 [totalprice] => 585.00 ) 
[29] => Array ( [day] => 30/08/2019 [totalprice] => 585.00 ) 
[30] => Array ( [day] => 31/08/2019 [totalprice] => 585.00 ) 
[31] => Array ( [day] => 01/09/2019 [totalprice] => 410.00 ) 
[32] => Array ( [day] => 02/09/2019 [totalprice] => 410.00 ) 
[33] => Array ( [day] => 03/09/2019 [totalprice] => 0.00 ) 
[34] => Array ( [day] => 04/09/2019 [totalprice] => 0.00 ) 
[35] => Array ( [day] => 05/09/2019 [totalprice] => 0.00 ) 
[36] => Array ( [day] => 06/09/2019 [totalprice] => 0.00 ) 
[37] => Array ( [day] => 07/09/2019 [totalprice] => 0.00 ) 
[38] => Array ( [day] => 08/09/2019 [totalprice] => 0.00 ) 
[39] => Array ( [day] => 09/09/2019 [totalprice] => 0.00 ) 
[40] => Array ( [day] => 10/09/2019 [totalprice] => 0.00 ) 
[41] => Array ( [day] => 11/09/2019 [totalprice] => 0.00 ) 
[42] => Array ( [day] => 12/09/2019 [totalprice] => 0.00 ) 
[43] => Array ( [day] => 13/09/2019 [totalprice] => 0.00 ) 
[44] => Array ( [day] => 14/09/2019 [totalprice] => 0.00 ) 
[45] => Array ( [day] => 15/09/2019 [totalprice] => 0.00 ) 
[46] => Array ( [day] => 16/09/2019 [totalprice] => 0.00 ) 
[47] => Array ( [day] => 17/09/2019 [totalprice] => 410.00 ) 
[48] => Array ( [day] => 18/09/2019 [totalprice] => 410.00 ) 
[49] => Array ( [day] => 19/09/2019 [totalprice] => 410.00 ) 
[50] => Array ( [day] => 20/09/2019 [totalprice] => 410.00 ) 
[51] => Array ( [day] => 21/09/2019 [totalprice] => 410.00 ) 
[52] => Array ( [day] => 22/09/2019 [totalprice] => 410.00 ) 
[53] => Array ( [day] => 23/09/2019 [totalprice] => 410.00 ) 
[54] => Array ( [day] => 24/09/2019 [totalprice] => 410.00 ) 
[55] => Array ( [day] => 25/09/2019 [totalprice] => 410.00 ) 
[56] => Array ( [day] => 26/09/2019 [totalprice] => 410.00 ) 
[57] => Array ( [day] => 27/09/2019 [totalprice] => 410.00 ) 
[58] => Array ( [day] => 28/09/2019 [totalprice] => 410.00 ) 
[59] => Array ( [day] => 29/09/2019 [totalprice] => 410.00 ) 
[60] => Array ( [day] => 30/09/2019 [totalprice] => 410.00 ) 
[61] => Array ( [day] => 01/10/2019 [totalprice] => 235.00 ) 
[62] => Array ( [day] => 02/10/2019 [totalprice] => 235.00 ) 
[63] => Array ( [day] => 03/10/2019 [totalprice] => 235.00 ) 
[64] => Array ( [day] => 04/10/2019 [totalprice] => 235.00 ) 
[65] => Array ( [day] => 05/10/2019 [totalprice] => 235.00 ) 
[66] => Array ( [day] => 06/10/2019 [totalprice] => 235.00 ) 
[67] => Array ( [day] => 07/10/2019 [totalprice] => 235.00 ) 
[68] => Array ( [day] => 08/10/2019 [totalprice] => 235.00 ) 
[69] => Array ( [day] => 09/10/2019 [totalprice] => 235.00 ) 
[70] => Array ( [day] => 10/10/2019 [totalprice] => 235.00 ) 
[71] => Array ( [day] => 11/10/2019 [totalprice] => 235.00 ) 
[72] => Array ( [day] => 12/10/2019 [totalprice] => 235.00 ) 
[73] => Array ( [day] => 13/10/2019 [totalprice] => 235.00 ) 
[74] => Array ( [day] => 14/10/2019 [totalprice] => 235.00 ) 
[75] => Array ( [day] => 15/10/2019 [totalprice] => 235.00 ) 
[76] => Array ( [day] => 16/10/2019 [totalprice] => 235.00 ) 
[77] => Array ( [day] => 17/10/2019 [totalprice] => 235.00 ) 
[78] => Array ( [day] => 18/10/2019 [totalprice] => 235.00 ) 
[79] => Array ( [day] => 19/10/2019 [totalprice] => 235.00 ) 
[80] => Array ( [day] => 20/10/2019 [totalprice] => 235.00 ) 
[81] => Array ( [day] => 21/10/2019 [totalprice] => 235.00 ) 
[82] => Array ( [day] => 22/10/2019 [totalprice] => 235.00 ) 
[83] => Array ( [day] => 23/10/2019 [totalprice] => 235.00 ) 
[84] => Array ( [day] => 24/10/2019 [totalprice] => 235.00 ) 
[85] => Array ( [day] => 25/10/2019 [totalprice] => 235.00 ) 
[86] => Array ( [day] => 26/10/2019 [totalprice] => 235.00 ) 
[87] => Array ( [day] => 27/10/2019 [totalprice] => 235.00 ) 
[88] => Array ( [day] => 28/10/2019 [totalprice] => 235.00 ) 
[89] => Array ( [day] => 29/10/2019 [totalprice] => 235.00 ) 
[90] => Array ( [day] => 30/10/2019 [totalprice] => 235.00 ) 
[91] => Array ( [day] => 31/10/2019 [totalprice] => 235.00 )
)

With the following code : 使用以下代码： 

foreach($blankarray as $rate){

    if ($rate['totalprice'] == '0'){
    } else {
        $firstrate = $rate['totalprice'];
        if ($firstrate != $previousrate) {
            $firstdate = $rate['day'];
            echo '<br>'.$firstdate; 
            echo '</br><font color="green"> <b>'.$firstrate .'</b></font>';
            $previousrate = $firstrate;
        }

I get: 我得到： 

01/08/2019
585.00
01/09/2019
410.00
01/10/2019
235.00

How can I add the previous date when totalprice is changing so I can have : 当totalprice更改时，如何添加上一个日期，所以我可以： 

01/08/2019
31/08/2019
585.00
01/09/2019
30/09/2019
410.00
01/10/2019
31/10/2019
235.00

3 个解决方案

解决方案1
 0  2019-02-04 22:06:58

Give this a try, I renamed your array to $rates and switched to a for loop. 试试看，我将您的数组重命名为$ rates并切换到for循环。 

$rates_count = sizeof($rates);
$previous = 1;
for($i = 1; $i < $rates_count; ++$i) {
    if($rates[$i]['totalprice'] !== 0) {
        if($rates[$i]['totalprice'] > $rates[$previous]['totalprice']) {
            echo
                '<br />', "\n",
                $rates[$i]['day'], "\n",
                '<br />', "\n",
                $rates[$previous]['day'], "\n",
                '<br />', "\n",
                '<span style="color: green; font-weight: bold;">', $rates[$i]['totalprice'], '</span>', "\n";
            $previous = $i;
        }
    }
}

解决方案2
 0  2019-02-04 22:09:14

Save the previous date and price in a variable. 将先前的日期和价格保存在变量中。 Whenever the price changes, print the previous date, the previous price, and the current date. 价格每变化一次，就打印前一个日期，前一个价格和当前日期。 

$prev_date = null
foreach ($blankarray as $rate) {
    if ($rate['totalprice'] == 0) {
        // ignore zero rows
        continue;
    }
    if ($rate['day'] != $prev_date) {
        if ($prev_date) {
            echo "$prev_date<br><span style='color: green;'>$prev_price</span><br>";
        }
    }
    $prev_date = $rate['date'];
    $prev_price = $rate['totalprice'];
    echo $rate['date'] . "<br>";
}
// End the last group
echo "$prev_date<br><span style='color: green;'>$prev_price</span><br>";

解决方案3
 0 已采纳  2019-02-04 22:10:36

This code will give you the results you want. 此代码将为您提供所需的结果。 It checks whether the current price in the array is not equal to either the previous price or the next price (ignoring all 0 values), and if so, it outputs the price: 它检查数组中的当前价格是否等于前一个价格或下一个价格（忽略所有0值），如果是，则输出价格： 

$previousprice = -1;
$thisprice = -1;
$nextprice = $blankarray[0]['totalprice'];
$c = count($blankarray);
for ($i = 0; $i < $c; $i++) {
    $previousprice = $thisprice;
    $thisprice = $nextprice;
    $nextprice = ($i == $c - 1) ? -1 : $blankarray[$i+1]['totalprice'];
    if ($previousprice == 0 || $thisprice == 0 || $nextprice == 0) continue;
    if ($thisprice != $previousprice) {
        echo '<br>'.$blankarray[$i]['day']; 
    }
    if ($thisprice != $nextprice) {
        echo '<br>'.$blankarray[$i]['day']; 
        echo '<br><font color="green"> <b>'.$blankarray[$i]['totalprice'].'</b></font>' . "\n";        
    }
}

Output: 输出： 

<br>01/08/2019<br>31/08/2019<br><font color="green"> <b>585</b></font> 
<br>01/09/2019<br>30/09/2019<br><font color="green"> <b>410</b></font> 
<br>01/10/2019<br>31/10/2019<br><font color="green"> <b>235</b></font>

Demo on 3v4l.org 3v4l.org上的演示

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