php 读取json数组

php 读取json数组

$Tdata='[{"A_Name":"a1","ICNo":"","A_ContNo":"","A_QQNo":""},{"A_Name":"a2","ICNo":"","A_ContNo":"","A_QQNo":""},{"A_Name":"a3","ICNo":"","A_ContNo":"","A_QQNo":""}]';

$arr=json_decode($Tdata,true);
//var_dump($arr);
echo stripcslashes ($arr[0][A_Name]);
?>
上面的方法可以打印输出，json_decode($Tdata）输出的结果是一个对应，而json_decode($Tdata,true）输出的是一个数组追问谢谢，请教一下， $arr[0][A_Name] 和 $arr[0]->A_Name 有什么区别呢？
我想读出 $num=count($A_Name); 就是A_Name在数组里面的数量多少，
还有怎么用 print_r把 A_Name 所有的都读出来呢？追答你那种方法没错，也可以用，这是转化为数组方便。
$arr[0][A_Name] 这个是数组,$arr[0]->A_Name这个是指针指向一个值的地址，你可以把json_decode($Tdata）输出的值打印出来，里面有三个对象。
而json_decode("$arr",true)是把它强制生成PHP关联数组，下面的方法可以得出里面的个数
$Tdata='[{"A_Name":"a1","ICNo":"","A_ContNo":"","A_QQNo":""},{"A_Name":"a2","ICNo":"","A_ContNo":"","A_QQNo":""},{"A_Name":"a3","ICNo":"","A_ContNo":"","A_QQNo":""},{"t":"tt"}]';

$arr=json_decode($Tdata,true);
foreach($arr as $value){
$total+=count($value);
}
echo $total;
?>

你问的是什么啊？这个程序没有问题啊追问可是读取不出来啊。我就想把数组里面的数据读取出来啊

$arr['A_Name']

json_decode($Tdata） 输出就行

代码应该是:
$Tdata='[{"A_Name":"a1","ICNo":"","A_ContNo":"","A_QQNo":""},{"A_Name":"a2","ICNo":"","A_ContNo":"","A_QQNo":""},{"A_Name":"a3","ICNo":"","A_ContNo":"","A_QQNo":""}]';
echo $Tdata . '
';
$arr=json_decode($Tdata);
print_r($arr[0]->A_Name);
?>