I have an array of objects; running print_r() returns the output below;
Array
(
[0] => stdClass Object
(
[sm_id] => 1
[c_id] => 1
)
[1] => stdClass Object
(
[sm_id] => 1
[c_id] => 2
)
)
How to loop through the result and access the student class objects?
Use
//$arr should be array as you mentioned as below
foreach($arr as $key=>$value){
echo $value->sm_id;
}
OR
//$arr should be array as you mentioned as below
foreach($arr as $value){
echo $value->sm_id;
}
$key=> part is not needed
$key => part. According to this benchmark, the loop is twice as fast, when you include the $key part: phpbench.comLooping over arrays and objects is a pretty common task, and it's good that you're wanting to learn how to do it. Generally speaking you can do a foreach loop which cycles over each member, assigning it a new temporary name, and then lets you handle that particular member via that name:
foreach ($arr as $item) {
echo $item->sm_id;
}
In this example each of our values in the $arr will be accessed in order as $item. So we can print our values directly off of that. We could also include the index if we wanted:
foreach ($arr as $index => $item) {
echo "Item at index {$index} has sm_id value {$item->sm_id}";
}
Assuming your sm_id and c_id properties are public, you can access them by using a foreach on the array:
$array = array(/* objects in an array here */);
foreach ($array as $obj) {
echo $obj->sm_id . '<br />' . $obj->c_id . '<br />';
}
Recursive traverse object or array with array or objects elements:
function traverse(&$objOrArray)
{
foreach ($objOrArray as $key => &$value)
{
if (is_array($value) || is_object($value))
{
traverse($value);
}
else
{
// DO SOMETHING
}
}
}
