php stdClass Object 问题

时间:2024-06-30 08:36:56
Array ( [0] => stdClass Object ( [term_id] => 3 [name] => apache [slug] => apache [term_group] => 0 [term_taxonomy_id] => 3 [taxonomy] => category [description] => [parent] => 0 [count] => 1 [cat_ID] => 3 [category_count] => 1 [category_description] => [cat_name] => apache [category_nicename] => apache [category_parent] => 0 ) [1] => stdClass Object ( [term_id] => 1 [name] => PHP [slug] => php [term_group] => 0 [term_taxonomy_id] => 1 [taxonomy] => category [description] => [parent] => 0 [count] => 1 [cat_ID] => 1 [category_count] => 1 [category_description] => [cat_name] => PHP [category_nicename] => php [category_parent] => 0 ) )
二维数组stdClass Object是一组json对象,如果要调用里面的数据,就要这样调用,
foreach($categories as $key => $value){
$cat = $value->term_id;
$name = $value->name;
}

或者json_decode第二个参数设为true:

mixedjson_decode ( string$json [, bool$assoc ] )

说明:接受一个 JSON 格式的字符串并且把它转换为 PHP 变量。

json_decode 可接收两个参数:

json:待解码的jsonstring 格式的字符串。

assoc:当该参数为 TRUE 时,将返回 array 而非 object 。

$students = json_decode($json,true);

这时打印一下 $students :

var_dump($students);

输出:

array(2) {

[0]=>

array(4) {

["id"]=> string(1)"1"

["name"]=> string(9)"张雪梅"

["age"]=> string(2)"27"

["subject"]=>string(24) "计算机科学与技术"

}

[1]=>

array(4) {

["id"]=> string(1)"2"

["name"]=> string(9)"张沛霖"

["age"]=> string(2)"21"

["subject"]=>string(12) "软件工程"

}

}

这时,$students 就是个数组了,可以直接用:

for($i=0;$i<count($students);$i++){
     echo "姓名:".$students[$i]['name']."年龄:".$students[$i]['age']."专业:".$students[$i]['subject']."<br/>";
}

输出结果为:

姓名:张雪梅   年龄:27   专业:计算机科学与技术
    姓名:张沛霖   年龄:21   专业:软件工程

总结:

在PHP代码中处理JSON 格式的字符串的两种方法:

方法一:

$json= '[{"id":"1","name":"\u5f20\u96ea\u6885","age":"27","subject":"\u8ba1\u7b97\u673a\u79d1\u5b66\u4e0e\u6280\u672f"},{"id":"2","name":"\u5f20\u6c9b\u9716","age":"21","subject":"\u8f6f\u4ef6\u5de5\u7a0b"}]';

$students= json_decode($json);//得到的是 object

foreach($studentsas $obj){

echo "姓名:".$obj->name."&nbsp;&nbsp;&nbsp;年 龄:".$obj->age."&nbsp;&nbsp;&nbsp;专 业:".$obj->subject."<br />";
}

方法二:

$json= '[{"id":"1","name":"\u5f20\u96ea\u6885","age":"27","subject":"\u8ba1\u7b97\u673a\u79d1\u5b66\u4e0e\u6280\u672f"},{"id":"2","name":"\u5f20\u6c9b\u9716","age":"21","subject":"\u8f6f\u4ef6\u5de5\u7a0b"}]';

$students= json_decode($json, true);//得到的是 array

for($i=0;$i<count($students);$i++){
    echo "姓名:".$students[$i]['name']."&nbsp;&nbsp;&nbsp;年 龄:".$students[$i]['age']."&nbsp;&nbsp;&nbsp;专 业:".$students[$i]['subject']."<br />";
}

参考:http://blog.****.net/wuhanzaizai/article/details/6874845