我需要在PHP中使用Json文件，以便可以在其主要元素的特定鍵中進行迭代。我有這個示例Json數(shù)據(jù)：[{"A": [ { "name": "object 1", "code": "x001", "date": "2018-01-01T23:00:00-0600" }, { "name": "object 2", "code": "x002", "date": "2018-01-01T23:00:00-0600" }, { "name": "object 3", "code": "x003", "date": "2018-01-01T23:00:00-0600" }]},{"B": [ { "name": "object 1", "code": "y001" "date": "2018-01-01T23:00:00-0600" }, { "name": "object 2", "code": "y002", "date": "2018-01-01T23:00:00-0600" }]}]據(jù)我所知，我可以像這樣處理一個Json文件（在主鍵A和B中取消嵌套元素）：<?php$url = './data.json';$data = file_get_contents($url);echo "<!--- File contents -->\n";var_dump($data);$contents = json_decode($data, true);echo "<!--- Associative Array -->\n";var_dump($contents);echo "<!--- BEGIN -->";foreach ($contents as $element) { echo "Name: " . $element['name'] . "\n"; echo "Code: " . $element['code'] . "\n"; echo "Date: " . $element['date'] . "\n"; echo "- - - - - -\n";}echo "<!--- END -->";?>我想做的是在給定鍵內(nèi)調(diào)用一個循環(huán)，例如，一個與B對應(yīng)的所有元素的循環(huán)： { "name": "object 1", "code": "y001" "date": "2018-01-01T23:00:00-0600" }, { "name": "object 2", "code": "y002", "date": "2018-01-01T23:00:00-0600" }可能是將這些元素提取到第二個關(guān)聯(lián)數(shù)組或另一個建議的方法中。預(yù)期結(jié)果需要為：Name: object 1Code: y001Date: 2018-01-01T23:00:00-0600- - - - - -Name: object 2Code: y002Date: 2018-01-01T23:00:00-0600- - - - - -忽略A元素
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嚕嚕噠
TA貢獻1784條經(jīng)驗 獲得超7個贊
該腳本可以幫助您設(shè)計和輸出所需的字符串。它適用于$element["B"]。您可以簡單地foreach為數(shù)組的其他元素（例如）編寫類似的代碼$element["A"]。
$url = './data.json';
$data = file_get_contents($url);
$output = "<!--- File contents -->\n";
$contents = json_decode($data, true);
$output .= "<!--- Associative Array -->\n";
$output .= "<!--- BEGIN -->\n";
foreach ($contents as $elements) {
if (!$elements["B"]) {continue;} // You might remove this and add other elements of your inputs such as $elements["A"]
foreach ($elements["B"] as $key => $element) {
$output .= "Name: " . $element['name'] . "\n";
$output .= "Code: " . $element['code'] . "\n";
$output .= "Date: " . $element['date'] . "\n";
$output .= "- - - - - -\n";
}
}
$output .= "<!--- END -->\n";
echo $output;
您可能不需要逐行回顯，您可以將其存儲在諸如$output和結(jié)尾的變量中echo $output;。
輸出：
<!--- File contents -->
<!--- Associative Array -->
<!--- BEGIN -->
Name: object 1
Code: y001
Date: 2018-01-01T23:00:00-0600
- - - - - -
Name: object 2
Code: y002
Date: 2018-01-01T23:00:00-0600
- - - - - -
<!--- END -->
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