php函数无法返回对象
PHPV5.4中面向对象的新编码器，遇到了一个奇怪的障碍。我有一个递归遍历对象层次结构的函数，它根据对象的类类型和唯一ID匹配对象，然后返回它：php函数无法返回对象,php,arrays,object,return,Php,Arrays,Object,Return,PHPV5.4中面向对象的新编码器，遇到了一个奇怪的障碍。我有一个递归遍历对象层次结构的函数，它根据对象的类类型和唯一ID匹配对象，然后返回它： public function getChildObjectById($searchObj, $newObjType, $newObjId = 0) { /* iterate through each child object in the array */ foreach($searchObj->getChildObjects
public function getChildObjectById($searchObj, $newObjType, $newObjId = 0) {
/* iterate through each child object in the array */
foreach($searchObj->getChildObjects() as $childObject) {
/* check if object is an instance of specified type */
if (is_object($childObject) && $childObject instanceof $newObjType) {
/* checks if the object id was matched */
$objFound = ($childObject->getId() == $newObjId);
if ($objFound) {
echo "*** found the object ***<br>";
echo "Found child object type: " . $newObjType . "<br>";
echo "id: " . $childObject->getId() . "<br>";
echo "<pre>";
print_r($childObject); // <-- object information populated here
echo "</pre>";
return ($childObject); // <-- lose it here
}
/**
* checks if the object has children. If so, recursively call function to continue
* searching the multidimensional array
*/
if (count($childObject->getChildObjects() > 0)) {
echo "child object has " . count($childObject->getChildObjects()) . " direct children:<br>";
echo "returning childObject:<br>";
echo "<pre>";
print_r($childObject); // <-- child object information populated here
echo "</pre>";
echo "retuning objtype: " . $newObjType . "<br>"; // <-- ItemGroup
echo "returning objId: " . $newObjId . "<br>"; // <-- 11
return $this->getChildObjectById($childObject, $newObjType, $newObjId);
} // as per suggestion added "return" to front of this call, still getting NULL and error message Fatal error: Call to a member function addChildObject() on a non-object on line 187
}
}
}
$objFound = $childObject->getId() == $newObjId; // no need for ? TRUE : FALSE
- getChildObjects（）可能不会返回您期望的结果
- 子对象可能不是作为参数传递的类的实例
无论如何，如果你想调试你的函数，我建议你放弃类类型检查，看看会发生什么。可能重复的，所以我看了Barmar的另一个问题，看了你的回答。它们看起来很相似，但当我尝试修复时，这段代码现在变成了：return$this->getChildObjectById（$childObject，$newObjType，$newObjId）；我仍然没有取回我的对象数据。ID与我存储在MySQL数据库中的内容匹配，它们不是任意的。我将尝试将其分为两个单独的函数，一个用于检查实例化对象的类，另一个用于检查id。你是对的，我想得太多了。问题解决了，最终重建了大约50%的对象类，并将检查分解为单个函数。递归数组可以工作，我确实成功地在递归调用前面使用了“return”。谢谢你的帮助，kuroi！：）
Collection Object
(
[id:DataObject:private] => 1
[properties:DataObject:private] => Array
(
[title] => Collection One
)
[childObjects:DataObject:private] => Array
(
[0] => Item Object
(
[id:DataObject:private] => 6
[properties:DataObject:private] => Array
(
[title] => Item Six
)
[childObjects:DataObject:private] => Array
(
)
)
[1] => Item Object
(
[id:DataObject:private] => 11
[properties:DataObject:private] => Array
(
[title] => Item Eleven
)
[childObjects:DataObject:private] => Array
(
)
)
[2] => Item Object
(
[id:DataObject:private] => 10
[properties:DataObject:private] => Array
(
[title] => Item Ten
)
[childObjects:DataObject:private] => Array
(
)
)
[3] => Item Object
(
[id:DataObject:private] => 14
[properties:DataObject:private] => Array
(
[title] => Item Fourteen
)
[childObjects:DataObject:private] => Array
(
)
)
[4] => ItemGroup Object
(
[id:DataObject:private] => 1
[properties:DataObject:private] => Array
(
[item_group_title] => 1
[item_group_depth] => 0
[item_group_parent_id] =>
)
[childObjects:DataObject:private] => Array
(
[0] => Item Object
(
[id:DataObject:private] => 7
[properties:DataObject:private] => Array
(
[title] => Item Seven
)
[childObjects:DataObject:private] => Array
(
)
)
[1] => Item Object
(
[id:DataObject:private] => 1
[properties:DataObject:private] => Array
(
[title] => Item One
)
[childObjects:DataObject:private] => Array
(
)
)
[2] => ItemGroup Object
(
[id:DataObject:private] => 5
[properties:DataObject:private] => Array
(
[item_group_title] => 1.4
[item_group_depth] => 1
[item_group_parent_id] => 1
)
[childObjects:DataObject:private] => Array
(
[0] => Item Object
(
[id:DataObject:private] => 2
[properties:DataObject:private] => Array
(
[title] => Item Two
)
[childObjects:DataObject:private] => Array
(
)
)
)
)
[3] => ItemGroup Object
(
[id:DataObject:private] => 2
[properties:DataObject:private] => Array
(
[item_group_title] => 1.1
[item_group_depth] => 1
[item_group_parent_id] => 1
)
[childObjects:DataObject:private] => Array
(
[0] => Item Object
(
[id:DataObject:private] => 8
[properties:DataObject:private] => Array
(
[title] => Item Eight
)
[childObjects:DataObject:private] => Array
(
)
)
)
)
)
)
)
)
$this->getChildObjectById($childObject, $newObjType, $newObjId);
$objFound = $childObject->getId() == $newObjId; // no need for ? TRUE : FALSE