PHP数组合并爆炸

我有一些字段接收来自各种输入的内容

$fields = array();

if (!empty($_POST['field1'])) {
 $fields = explode(',', $_POST['field1']);
 // receives: foo1, foo2
}

if (!empty($_POST['field2'])) {
 $fields = explode(',', $_POST['field2']);
 //receives: foo3, foo4, foo5
}

if (!empty($_POST['field3'])) {
 $fields = explode(',', $_POST['field3']);
 //receives: foo6
}

// Array ( [0] => foo1 [1] => foo2 ) 
// Array ( [0] => foo3 [1] => foo4 [2] => foo5 )
// Array ( [0] => foo6 )

我想把它们放到一个简单的数组中

//Array ( [0] => foo1 [1] => foo2 [2] => foo3 [3] => foo4 [4] => foo5 [5] => foo6 )

---

您可以通过以下几种方式进行：

方式1-

方式2-

---

提示：

array\u merge

第二个示例不会产生相同的结果。来自

field2

和

field3

的片段本身将是数组，从而生成多维数组。@El_Vanja我更改了答案，对于您的注释，即使在更新之后，它仍将生成多维数组（您有语法错误，忘记关闭外括号）。在发布之前测试代码。您需要对

分解

的结果使用扩展运算符

…

，以使其正常工作。

$fields = array();

if (!empty($_POST['field1'])) {
 $fields = explode(',', $_POST['field1']);
 // receives: foo1, foo2
}

if (!empty($_POST['field2'])) {
 $fields = array_merge($fields, explode(',', $_POST['field2']));
 //receives: foo3, foo4, foo5
}

if (!empty($_POST['field3'])) {
 $fields = array_merge($fields, explode(',', $_POST['field3']));
 //receives: foo6
}

$fields = array();

if (!empty($_POST['field1'])) {
 $fields = explode(',', $_POST['field1']);
 // receives: foo1, foo2
}

if (!empty($_POST['field2'])) {
    foreach (explode(',', $_POST['field2']) as $val) {
      array_push($fields, $val);
    }
    //receives: foo3, foo4, foo5
}

if (!empty($_POST['field3'])) {
    foreach (explode(',', $_POST['field3']) as $val) {
      array_push($fields, $val);
    }
   //receives: foo6
}