我有以下数组:
print_r($all_projects);
--------------------------------
Array (
[0] => Array (
[pro_id] => 7
[0] => 7
)
[1] => Array (
[pro_id] => 20
[0] => 20
)
)
如何在foreach循环中抓取每个pro_id
?
我可以在网上找到有关如何创建数组的相关信息,以及如何从数组中获取键和值。但是我很难在数组中获取数组中键的值。
我目前每个都有这个:
foreach ($all_projects as $project => $project_id){
echo $project_id;
}
反过来又返回以下内容:
Array
Array
这对我有意义,但如何在数组中使用deeper?
答案 0 :(得分:3)
foreach($all_projects as $project) {
echo $project['pro_id'];
}
答案 1 :(得分:0)
尝试:
foreach ($all_projects as $project => $project_id){
echo $project_id['pro_id'];
}
甚至更清洁阅读:
foreach ($all_projects as $project){
echo $project['pro_id'];
}
答案 2 :(得分:0)
foreach($all_projects as $KEY => $VALUE) {
echo "KEY: $KEY - PRO_ID: {$VALUE['pro_id']}";
}
在您的情况下,您需要:
foreach ($all_projects as $project_id => $project) {
echo $project_id . " = " . $project['pro_id'];
}
答案 3 :(得分:0)
现在有了PHP5.5,你可以轻松地做到这一点:
foreach ($all_projects as list($id))
echo $id;
旧方式:
foreach ($all_projects as $project)
echo $project['pro_id'];
希望它能帮到你!
答案 4 :(得分:0)
如果我们以这种方式循环$all_projects
foreach
循环,
foreach ($all_projects as $key => $project) {
echo($key);
}
然后$key
实际上是0,1,等等,而不是7或20 - 正如您可能想要的那样 - 而$project
将是项目的内容。
在你的情况下,我假设你想要的“项目ID”存储在“project”数组本身中,所以正如其他建议的那样,你应该写一些类似的东西
foreach($all_projects as $project) { // omitting the $key part since you don't need it
echo($project['pro_id']);
}
这将打印实际的“项目ID”,即您想要的pro_id
。
如果您要改进此代码,可能需要以这种方式重新构建$all_projects
$all_projects = array();
$all_project[7] = $some_project; // your first project with id 7
$all_project[20] = $some_other_project; // your second project with id 20
然后您将能够使用原始代码循环:
foreach($all_projects as $project_id => $project) {
echo($project_id);
}
$project_id
为7,20等,$project
为您项目的内容。
希望这能回答你的问题!