如何处理并拿到需要的 JSON 数据 - PHP

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<?php
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//生产JSON数据
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$json_data = array ('id'=>1355471563,'name'=>"npc",'country'=>'usa',"office"=>array("microsoft",'oracle'=>'https://www.npc.ink/'));
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$json_num = json_encode($json_data);
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echo $json_num;
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    //拿到数据解码
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    $json_url=json_decode($json_num,true);
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    //取得需要的值
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    $one_data =  $json_url['name'];
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    $two_data =  $json_url['office']['0'];
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    $three_data =  $json_url['office']['oracle'];
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    echo '<br />您本次的$one_data是：<br />'.$one_data."<br />";
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    echo '<br />您本次的$two_data是：<br />'.$two_data."<br />";
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    echo '<br />您本次的$three_data是：<br />'.$three_data."<br />";
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?>

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{"id":1355471563,"name":"npc","country":"usa","office":{"0":"microsoft","oracle":"https://www.npc.ink/"}}
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您本次的$one_data是：
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npc
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您本次的$two_data是：
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microsoft
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您本次的$three_data是：
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https://www.npc.ink/

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<?php
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  header('Content-Type:application/json');//加上这行,前端那边就不需要var result = $.parseJSON(data);
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   $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
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   echo json_encode($arr);
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?>

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{"a":1,"b":2,"c":3,"d":4,"e":5}