I have JSON script that return some data but sometimes its empty and my foreach loop throws out an error when its empty here is my code
<?php
$planItems = getJSON('getPlanItems');
foreach ((array)$planItems->items as $item){
?>
I notice its because of
$planItems->items
Removing the -> doesnt throw out the error but then I cant read the result correctly from the JSON data.
Is there anyway to fix this?
Of course it errors when $planItems->items isn't set or is not an array. It's not very convenient, but that's what foreach does. To prevent it, you need to check before looping, e.g.:
if (isset($planItems->items) && is_array($planItems->items)) {
foreach ($planItems->items as $item) {
// ....
}
}
You've got a good nose, indeed the problematic part is:
$planItems->items
This would only work if $planItems is an object and has the items member. You need to check that first, most likely you have missed to check the return value from getJSON for the error conditions.
$planItems = getJSON('getPlanItems');
if ($planItems === ???) { # do your error condition checking here
throw new UnexpectedValueException('Remove Json Request error.');
}
If you add proper error handling to your code, the problems will disappear.
foreach. But anyway, at the foreach it is too late. You need to check the post-conditions after you've call getJSON. Do the error checking first. If getJson does remote interaction, what do you do when remote is down or not reachable? What will the function return?$array is an array and count of it is 0, then foreach would have 0 iterations. Ergo: You do not need to care about that case.if (count($planItems)>0){ foreach ($planItems->items as $item) SO if array is bigger then 0 it will run the loop else I do something else. Im still confused why is it that I dont need countYou can convert JSON to Array using json_decode PHP function with second parameter true. and then before foreach write condition if (!empty($planItems ))
It would be
<?php
$planItems = json_decode(getJSON('getPlanItems'),true);
if (!empty($planItems['items'] ))
foreach ($planItems['items'] as $item){
?>
->items, Good Luck.
var_dump(getJSON('getPlanItems'));??