在PHP中，我从mySQL编码了一个JSON数组，如何使用它？ 解码？

Question

$sql = "SELECT * FROM `scripts` LIMIT 0, 30 ";   
$result = mysql_query($sql) or die ('Error updating database: ' . mysql_error()); 
$json = array(); 
if(mysql_num_rows($result)) { 
    while($row=mysql_fetch_row($result)) { 
        $json['table data'][]=$row;
    } 
 } 
$encoded = json_encode($json); 
echo $encoded; 

This is my output:

{"table data":[["1","test","30","13"],["2","test2","40","14"]]}

How do I access an individual piece of the array, its an array of arrays? do i decode it first?

Answer 1

Try to decode

$json = '{"foo-bar": 12345}';

$obj = json_decode($json);
print $obj->{'foo-bar'}; // 12345

Bye Bye

Answer 2

you use

 $json['table data'][$id]

where $id is the row you want to access

so for example

$json['table data'][0][1]  == "test"
$json['table data'][1][1]  == "test2"

Answer 3

将数据添加到数组时，创建一个数组。

$json['table data'][] = array($row);