[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
我有以下關聯數組:
<? $group_array;
輸出以下內容:
Array
(
[user_id] => Array
(
[0] => 594
[1] => 597
)
[user_first] => Array
(
[0] => John
[1] => Jane
)
[user_last] => Array
(
[0] => Smith
[1] => Jones
)
)
我的問題是:如何遍歷數組並通過其名稱輸出特定值?
例如,類似:
<?php
foreach ($group_array as $key => $value) {
print($key['user_id']);
print($key['user_first']);
// etc...
}
但這似乎不起作用。 任何幫助都會很棒。 謝謝!
foreach ($group_array['user_id'] as $key => $value) {
print($value); // user id
print($group_array['user_first'][$key]);
print($group_array['user_last'][$key]);
}
您無需遍歷數組即可通過鍵名稱來調用鍵
echo $group_array['user_id'][0];
// Result: 594
如果要遍歷值,可以執行以下操作:
for ($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的答案是正確的,但我認為您的陣列結構不佳,為便於訪問和使用,我建議使用類似的方法
Array
(
[0] => Array
(
[user_id] => 594
[user_first] => John
[user_last] => Smith
)
[1] => Array
(
[user_id] => 597
[user_first] => Jane
[user_last] => Jones
)
)
為了這樣的輕松訪問:
foreach($group_array as $person) {
print($person['user_id']);
print($person['user_first']);
print($person['user_last']);
}
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