PHP foreach循环键值
PHP foreach循环键值
提问于 2009-12-03 02:00:25
我正在运行这个DB调用来获取多维数组，我试图获取每个数组的键，但当我尝试时，结果是空的或数组。
$root_array = array();
$sites = $this->sites($member_id);
foreach ($sites as $site){
$records = $this->db->select('p.name as place_name, p.id as place_id,p.active as place_status')
->from('places p')
->join('members_permissions pm','pm.sites_id = p.sites_id and pm.members_id ='.$member_id)
->where('p.active', 0)
->get();
$places = $records->result_array();
$places['name'] = $site['name'];
foreach($places as $place){
$root_array[$site['name']][] = $place;
}
}
return $root_array;下面是我循环通过的php：
<?php foreach($places as $site): ?>
<h5><?=key($site)?></h5>
<?php foreach($site as $place): ?>
<h6><?=$place['place_name']?></h6>
<?php endforeach?>
<?php endforeach ?>同样，当我运行一个测试，它只是输出数组，这就是结果，我试图呈现的是费城
[Philadelphia] => Array
(
[0] => Array
(
[place_name] => XYX
[place_id] => 103200
[place_status] => 0
)
[1] => Array
(
[place_name] => YYYY
[place_id] => 232323
[place_status] => 0
)回答 4
Stack Overflow用户
回答已采纳
发布于 2009-12-03 02:03:24
您可以像这样访问数组密钥：
foreach ($array as $key => $value)Stack Overflow用户
发布于 2009-12-03 02:33:35
正如Pekka上面所说的那样
foreach ($array as $key => $value)此外，您可能还想尝试使用递归函数
displayRecursiveResults($site);
function displayRecursiveResults($arrayObject) {
foreach($arrayObject as $key=>$data) {
if(is_array($data)) {
displayRecursiveResults($data);
} elseif(is_object($data)) {
displayRecursiveResults($data);
} else {
echo "Key: ".$key." Data: ".$data."<br />";
}
}
}Stack Overflow用户
发布于 2014-03-07 11:30:46
您也可以使用array_keys()。新手友好：
$keys = array_keys($arrayToWalk);
$arraySize = count($arrayToWalk);
for($i=0; $i < $arraySize; $i++) {
echo '<option value="' . $keys[$i] . '">' . $arrayToWalk[$keys[$i]] . '</option>';
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1834703
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