如何使用PHP讀取json屬性

Question

如何從php中使用最小循環的json數據獲取所有pid和styles屬性

{"general":{"note":{"display":false}},"elements":{"the-1":{"index":1,"src":"shirt1.png","pid":"pid-3563130","angle":0,"styles":"background:transparent;top:51.80000305175781px;left:122px;width:80px;height:80px;","background":"transparent","pos":{"top":51.80000305175781,"left":122},"size":{"width":80,"height":80},"details":{"other":""}},"the-2":{"index":2,"src":"shirt2.png","pid":"pid-132002","angle":0,"styles":"background:transparent;top:44.80000305175781px;left:155px;width:80px;height:80px;","background":"transparent","pos":{"top":44.80000305175781,"left":155},"size":{"width":80,"height":80},"details":{"other":""}}}}

謝謝

Answer 1

$str = '{"general":{"note":{"display":false}},"elements":{"the-1":{"index":1,"src":"shirt1.png","pid":"pid-3563130","angle":0,"styles":"background:transparent;top:51.80000305175781px;left:122px;width:80px;height:80px;","background":"transparent","pos":{"top":51.80000305175781,"left":122},"size":{"width":80,"height":80},"details":{"other":""}},"the-2":{"index":2,"src":"shirt2.png","pid":"pid-132002","angle":0,"styles":"background:transparent;top:44.80000305175781px;left:155px;width:80px;height:80px;","background":"transparent","pos":{"top":44.80000305175781,"left":155},"size":{"width":80,"height":80},"details":{"other":""}}}}';

$arr = json_decode($str, true);

foreach ($arr['elements'] as $element) {
    echo 'pid: ' . $element['pid'] . '<br />';
    echo 'styles: ' . $element['styles'] . '<br />';
}

Answer 2

在PHP中使用json_decode函數來獲得assosiative數組。

<?php
    $myJson = '{"general":{"note":{"display":false}},"elements":{"the-1":{"index":1,"src":"shirt1.png","pid":"pid-3563130","angle":0,"styles":"background:transparent;top:51.80000305175781px;left:122px;width:80px;height:80px;","background":"transparent","pos":{"top":51.80000305175781,"left":122},"size":{"width":80,"height":80},"details":{"other":""}},"the-2":{"index":2,"src":"shirt2.png","pid":"pid-132002","angle":0,"styles":"background:transparent;top:44.80000305175781px;left:155px;width:80px;height:80px;","background":"transparent","pos":{"top":44.80000305175781,"left":155},"size":{"width":80,"height":80},"details":{"other":""}}}}';  
    $myArray = json_decode($myJson,true);
    $myInnerArray = $myArray['elements'];
    $styles = array();
    foreach($myInnerArray as $element)
       $styles[] = $element['styles'];
    print_r($styles);

    ?>

Answer 3

PHP具有處理json的強大功能。

假設您上面發布的JSON字符串存儲在PHP變量$myJSON 。

因此，我們可以輕松地將這些值的關聯數組存儲到$myJSONArray如下所示：

$myJSONArray = json_decode( $myJSON, true );

那么，現在我們只是循環：

foreach( $myJSONArray['elements'] as $arr => $key )
     echo( "A PID: " . $key['pid'] . "\n" );

在Codepad上查看它。

Answer 4

$json = json_decode('{"general":{"note":{"display":false}},"elements":{"the-1":{"index":1,"src":"shirt1.png","pid":"pid-3563130","angle":0,"styles":"background:transparent;top:51.80000305175781px;left:122px;width:80px;height:80px;","background":"transparent","pos":{"top":51.80000305175781,"left":122},"size":{"width":80,"height":80},"details":{"other":""}},"the-2":{"index":2,"src":"shirt2.png","pid":"pid-132002","angle":0,"styles":"background:transparent;top:44.80000305175781px;left:155px;width:80px;height:80px;","background":"transparent","pos":{"top":44.80000305175781,"left":155},"size":{"width":80,"height":80},"details":{"other":""}}}}', true);
$elements = $json['elements'];
foreach($elements as $element){
    $pid = $element['pid'];
    $styles = $element['styles'];
    echo $pid.': '.$styles.'<br />';
}

這里的例子