How to decode JSON event datasets? - php

Question

How would I decode this JSON data to get the Location link of the event? NOTE: When I say Location I don't mean the field "location" in the json data, I am referring to the field which is in "customFields", then has a "value" which is a link to Google Maps, it also has the "type" = 9.
Problem: I am currently stuck with a page which looks like the image below, the "Notice: Undefined offset: # in...." error continues for 200 lines, because the JSON file contains the data of 200 events, the JSON included only contains the first event.
Desired Result: For the link to google maps page to be echoed on every line. I think the solution is very simple, just changing my Source code (Included) so that it can read the JSON file.
JSON dataset:
[{"eventID":152913573,"template":"Brisbane City Council","title":"Clock Tower Tour","description":"The Clock Tour Tower is a ‘must-do’ for anyone and everyone in Brisbane!<br /> <br /> For many years, City Hall’s Clock Tower made the building the tallest in Brisbane, offering visitors a magnificent 360 degree view of the city around them. Whilst the view has changed significantly over the last 90 years, the time-honoured tradition of “taking a trip up the tower” happily continues at Museum of Brisbane.<br /> <br /> The Clock Tower Tour includes a ride in one of Brisbane’s oldest working cage lifts, a look behind Australia’s largest analogue clock faces and time to explore the observation platform that shares a unique perspective of the city. See if you can catch a glimpse of the bells!<br /> <br /> <strong>Location</strong>: Tour begins from Museum of Brisbane reception on Level 3 of City Hall.","location":"Museum of Brisbane, Brisbane City","webLink":"","startDateTime":"2021-06-13T00:00:00","endDateTime":"2021-06-14T00:00:00","dateTimeFormatted":"Sunday, June 13, 2021","allDay":true,"startTimeZoneOffset":"+1000","endTimeZoneOffset":"+1000","canceled":false,"openSignUp":false,"reservationFull":false,"pastDeadline":false,"requiresPayment":false,"refundsAllowed":false,"waitingListAvailable":false,"signUpUrl":"https://eventactions.com/eareg.aspx?ea=Rsvp&invite=0tva7etjn38te1bve2yj59425pupt7wvscmr1z6depcj9ctnrh7r","repeatingRegistration":0,"repeats":"Every Sunday, Tuesday, Wednesday, Thursday, Friday and Saturday through June 30, 2021","seriesID":152913560,"eventImage":{"url":"https://www.trumba.com/i/DgDhxtvzZEBEz%2AjAEUDofPUE.jpeg","size":{"width":1290,"height":775}},"detailImage":{"url":"https://www.trumba.com/i/DgDhxtvzZEBEz%2AjAEUDofPUE.jpeg","size":{"width":1290,"height":775}},"customFields":[{"fieldID":22503,"label":"Venue","value":"Museum of Brisbane, Brisbane City","type":17},{"fieldID":22505,"label":"Venue address","value":"Museum of Brisbane, Brisbane City Hall, 64 Adelaide Street, Brisbane City","type":9},{"fieldID":21859,"label":"Event type","value":"Family events, Free","type":17},{"fieldID":22177,"label":"Cost","value":"Free","type":0},{"fieldID":23562,"label":"Age","value":"Suitable for all ages","type":0},{"fieldID":22732,"label":"Bookings","value":"Book via the Museum of Brisbane website.","type":1},{"fieldID":51540,"label":"Bookings required","value":"Yes","type":3}],"permaLinkUrl":"https://www.brisbane.qld.gov.au/trumba?trumbaEmbed=view%3devent%26eventid%3d152913573","eventActionUrl":"https://eventactions.com/eventactions/brisbane-city-council#/actions/cvuzsak1g2d45mndcjwkp24nfw","categoryCalendar":"Brisbane's calendar|Museum of Brisbane","registrationTransferTargetCount":0,"regAllowChanges":true}]
Code so far:
<?php
$output = file_get_contents("Events.json");
$decode = json_decode($output, true);
for($i = 0; $i < count($decode); $i++) {
if($decode[$i]['customFields'][$i]['type'] == 9){
echo $decode[$i]['customFields'][$i]['label'][$i]['value'];
}
echo "<br>";
}
?>

Answer 1

You're using the $i loop counter twice in the same expression, but the second time you use it it's pointing at non-existent elements. The snippet below 1) treats JSON objects as objects (I find it less confusing when matching code to data), and 2) uses foreach to iterate over the arrays.
I've also extracted the latitude and longitude for you into $latlong
Try this:
$decode = json_decode($json);
foreach ($decode as $event) {
foreach ($event->customFields as $field) {
if ($field->type == 9) {
echo $field->value."\n";
if (preg_match('/href="(.*?)"/', $field->value, $matches)){
preg_match('/q=([\-\.0-9]*),([\-\.0-9]*)/',$matches[1], $latlong);
array_shift($latlong);
var_dump($latlong);
}
break;
}
}
}
Output
Museum of Brisbane, Brisbane City Hall, 64 Adelaide Street, Brisbane City
array(2) {
[0]=>
string(11) "-27.4693454"
[1]=>
string(11) "153.0216909"
}
Demo:https://3v4l.org/AkRvI