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我想写一个“智能”数组搜索功能,将记住最后找到的项目。分配参考静态变量
function &GetShop(&$shops, $id) {
static $lastShop = null;
if ($lastShop == null) {
echo "lastShop is null <br/>";
} else {
echo "lastShop: [" . print_r($lastShop, true) . "]<br/>";
}
if ($lastShop != null && $lastShop['id'] == $id) {
return $lastShop;
}
for ($i = 0; $i < count($shops); $i++) {
if ($shops[$i]['id'] == $id) {
$lastShop = &$shops[$i];
return $shops[$i];
}
}
}
$shops = array(
array("id"=>"1", "name"=>"bakery"),
array("id"=>"2", "name"=>"flowers")
);
GetShop($shops, 1);
GetShop($shops, 1);
GetShop($shops, 2);
GetShop($shops, 2);
然而,似乎是与行的发行人:
$lastShop = &$shops[$i];
当我运行这个功能,因为它是,我得到这样的输出:
lastShop is null
lastShop is null
lastShop is null
lastShop is null
当我删除“&”,而不是价值传递,它工作正常:
lastShop is null
lastShop: [Array ([id] => 1 [name] => bakery) ]
lastShop: [Array ([id] => 1 [name] => bakery) ]
lastShop: [Array ([id] => 2 [name] => flowers) ]
但是我想通过引用传递,因为找到的数组需要随后修改。有人遇到过这个问题,并可以建议他如何解决它?
似乎这不是解决问题(已经尝试过),因为按照[PHP文档(http://www.php.net/manual/en/language.variables。 scope.php#language.variables.scope.static)函数中的静态变量只在第一次调用时被初始化。 – quentinadam
@goldmine查看更新 – feeela
谢谢。你会对我如何实现我想要做的事情有任何建议吗(即将引用存储到数组中的最后一个找到的项)? – quentinadam