如何从数据库中动态创建JSON数组

Question

我有一个包含姓和名的一些employees.Now我的问题是如何动态创建一个JSON数组就像一个表：

"employees":[ 
{"firstName":"John", "lastName":"Doe"}, 
{"firstName":"Anna", "lastName":"Smith"}, 
{"firstName":"Peter","lastName":"Jones"} 

]

Answer 1

伪码

rows= query("select firstName,lastName from employees") 

array a=[] //initialize empty array 
for (index,row) in rows 
    set a[index]=array('firstname'=>row.firstname,'lastname'=>row.lastname) 
end for 
b= json_encode(a) 

PHP实现

//in php connect to database 
$result = mysql_query("select firstName,lastName from employees"); 
if (!$result) { 
    echo 'Could not run query: ' . mysql_error(); 
    exit; 
} 
$a=array(); 
while($row = mysql_fetch_row($result)){ 
    $a[]=$row; 
} 
$b=json_encode($a); 
echo $b;