在 PHP 中，如何将对象元素添加到数组中？
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In PHP, how can I add an object element to an array?
提问by adamdport
I'm using PHP. I have an array of objects, and would like to add an object to the end of it.
我正在使用 PHP。我有一个对象数组，并想在它的末尾添加一个对象。
$myArray[] = null; //adds an element
$myArray[count($myArray) - 1]->name = "my name"; //modifies the element I just added
The above is functional, but is there a cleaner and more-readable way to write that? Maybe one line?
以上是功能性的，但是有没有一种更清晰、更易读的方式来编写它？也许是一行？
回答by halfer
Just do:
做就是了：
$object = new stdClass();
$object->name = "My name";
$myArray[] = $object;
You need to create the object first (the newline) and then push it onto the end of the array (the []line).
您需要先创建对象（new行），然后将其推到数组的末尾（[]行）。
You can also do this:
你也可以这样做：
$myArray[] = (object) ['name' => 'My name'];
However I would argue that's not as readable, even if it is more succinct.
但是，我认为这不是那么可读，即使它更简洁。
回答by Frederik Kammer
Do you really need an object? What about:
你真的需要一个对象吗？关于什么：
$myArray[] = array("name" => "my name");
Just use a two-dimensional array.
只需使用二维数组。
Output (var_dump):
输出（var_dump）：
array(1) {
[0]=>
array(1) {
["name"]=>
string(7) "my name"
}
}
You could access your last entry like this:
您可以像这样访问您的最后一个条目：
echo $myArray[count($myArray) - 1]["name"];
回答by ahinkle
Here is another clean method I've discovered if you have multiple records within a foreach:
这是我发现的另一种干净的方法，如果您在一个 中有多个记录foreach：
$foo = [];
array_push($foo, (object)[
'key1' => 'fooValue'
'key2' => 'fooValue2'
'key3' => 'fooValue3'
]);
return $foo;
回答by Moisés Márquez
Something like:
就像是：
class TestClass {
private $var1;
private $var2;
private function TestClass($var1, $var2){
$this->var1 = $var1;
$this->var2 = $var2;
}
public static function create($var1, $var2){
if (is_numeric($var1)){
return new TestClass($var1, $var2);
}
else return NULL;
}
}
$myArray = array();
$myArray[] = TestClass::create(15, "asdf");
$myArray[] = TestClass::create(20, "asdfa");
$myArray[] = TestClass::create("a", "abcd");
print_r($myArray);
$myArray = array_filter($myArray, function($e){ return !is_null($e);});
print_r($myArray);
I think that there are situations where this constructions are preferable to arrays. You can move all the checking logic to the class.
我认为在某些情况下，这种结构比数组更可取。您可以将所有检查逻辑移动到类中。
Here, before the call to array_filter $myArrayhas 3 elements. Two correct objects and a NULL. After the call, only the 2 correct elements persist.
在这里，在调用 array_filter 之前$myArray有 3 个元素。两个正确的对象和一个 NULL。调用后，只有 2 个正确的元素仍然存在。
