!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>

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