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[英]php - how to loop through values of one specific key in an associative array?
[英]PHP Iterate Through Associative Array and Get Specific Values
我有以下关联数组:
<? $group_array;
输出以下内容:
Array
(
[user_id] => Array
(
[0] => 594
[1] => 597
)
[user_first] => Array
(
[0] => John
[1] => Jane
)
[user_last] => Array
(
[0] => Smith
[1] => Jones
)
)
我的问题是:如何遍历数组并通过其名称输出特定值?
例如,类似:
<?php
foreach ($group_array as $key => $value) {
print($key['user_id']);
print($key['user_first']);
// etc...
}
但这似乎不起作用。 任何帮助都会很棒。 谢谢!
foreach ($group_array['user_id'] as $key => $value) {
print($value); // user id
print($group_array['user_first'][$key]);
print($group_array['user_last'][$key]);
}
您无需遍历数组即可通过键名称来调用键
echo $group_array['user_id'][0];
// Result: 594
如果要遍历值,可以执行以下操作:
for ($i=0;$i<count($group_array['user_id']);$i++) {
echo $group_array['user_id'][$i];
echo $group_array['user_first'][$i];
echo $group_array['user_last'][$i];
}
Crayon Violent的答案是正确的,但我认为您的阵列结构不佳,为便于访问和使用,我建议使用类似的方法
Array
(
[0] => Array
(
[user_id] => 594
[user_first] => John
[user_last] => Smith
)
[1] => Array
(
[user_id] => 597
[user_first] => Jane
[user_last] => Jones
)
)
为了这样的轻松访问:
foreach($group_array as $person) {
print($person['user_id']);
print($person['user_first']);
print($person['user_last']);
}
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