在php中求和两个数组值

Question

我有两个饼干及其价值如下：

$url = "http://www.google.com"
PowerShell Invoke-WebRequest -Uri $url -Method GET 

但它只打印一个值。如何添加这两个值来对它们求和？

Answer 1

我认为你不需要array_sum，只需使用+ =运算符就可以节省一点内存

$t_cost = 0;
foreach($_COOKIE as $key=>$val) {
    $piece = explode(",", $val);
    $t_cost += $piece[3];
}
echo $t_cost;

Answer 2

实际上不需要array_sum。

// the array where all piece[3] values are stored
$t_cost = array();

// loop through array
// just foreach($_COOKIE as $val) is enough
foreach($_COOKIE as $key=>$val) {

    // split by comma
    $piece = explode(",", $val);

    // add to array
    $t_cost[] = $piece[3];

}
// sum up  
$total_cost = array_sum($t_cost);   

或只是

$total = 0;
foreach($_COOKIE as $key=>$val) {
        $piece = explode(",", $val);  
        $total += $piece[3];
}
echo $total;

Answer 3

$total = 0;
foreach($_COOKIE as $key=>$val) {
      $piece = explode(",", $val);
      $t_cost = trim(str_replace('$', '', array($piece[3]));
      $total += (float)$t_cost;
      echo "The total cost: $".$total;
}