php中输出json对象的值

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 <!DOCTYPE html><html><body><?php $json = '{"report":{"date":"2012-04-10","content":"abcdefght"}}';  $arr = (array) json_decode($json,true);  echo '当前日期是：'. $arr['report']['date'];echo "<br/>";echo '<pre>';  print_r($arr);echo '</pre>';      foreach($arr as $arrvalue)  {    foreach($arrvalue as $key=>$value)    {      echo "[$key] = $value <br />";    }  }echo "<br/>";?> </body></html>

<!DOCTYPE html><html><body><?php$file_exists = file_exists("json.txt");if( $file_exists ){    $myfile = fopen("json.txt", "r") or die("");    $content = fread($myfile,filesize("json.txt"));    fclose($myfile);    echo $content;    echo "<br/>";    $arr=(array)json_decode($content,true);    echo $arr['CSS'];    echo "<br/>";    echo $arr['AJAX'];}?>  </body></html>

json.txt:

{
"AJAX": "Asynchronous JavaScript and XML",
"CSS": "Cascading Style Sheets"
}

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