如何从PHP中删除JSON中的密钥？

Question

如何删除密钥＆＃34; src＆＃34;如果在数组中找到它，可以从这个JSON中获取吗？

$json = '[{"label":"360","file":"http://aaa","src":"http://aaa"},
{"label":"480","file":"http://bbb","src":"http://bbb"},
{"label":"720","file":"http://ccc","src":"http://ccc"},
{"label":"1080","file":"http://ddd","src":"http://ddd"}]';

期望的最终结果是：

$json = '[{"label":"360","file":"http://aaa"},
{"label":"480","file":"http://bbb"},
{"label":"720","file":"http://ccc"},
{"label":"1080","file":"http://ddd"}]';

Answer 1

假设你的json是正确的（上面没有，因为它周围缺少[]），在下面纠正。

$json = '[{"label":"360","file":"http://aaa","src":"http://aaa"},{"label":"480","file":"http://bbb","src":"http://bbb"},{"label":"720","file":"http://ccc","src":"http://ccc"},{"label":"1080","file":"http://ddd","src":"http://ddd"}]';

$decoded = json_decode($json, true);

foreach($decoded as $id => $row) {
    unset($row[$id]['src']);
}

$json = json_encode($decoded);