## General developer forum

### Trying to get property of non-object in php

Trying to get property of non-object in php

Hi

I am getting the above error message and I haven't a clue what is causing it so any help would be much appreciated. The code is shown below and it is the line in bold that is causing the problem

// Sensor location of local raspberry shake
$sensor['latitude'] = -27.5;$sensor['longitude'] = 153.02;

$data['format'] = 'geojson'; // Only fetch quakes with a magnitude >= 5$data['minmagnitude'] = '5';
$data['starttime'] =$startdate;
$data['endtime'] =$enddate;

$shakes = json_decode($events->CallAPI('GET', $url,$data));

foreach ($shakes->features as$shake){
$quake['id'] =$shake->id;
$quake['longitude'] =$shake->geometry->coordinates[0];
$quake['latitude'] =$shake->geometry->coordinates[1];
$quake['depth'] =$shake->geometry->coordinates[2];
$quake['mag'] =$shake->properties->mag;
$quake['place'] =$shake->properties->place;
$quake['time'] =$shake->properties->time;  // storing time as milliseconds since 01/01/1970 (UTC)
$quake['angular_distance'] =$events->angle($sensor['latitude'],$quake['latitude'], $sensor['longitude'],$quake['longitude']);
$quake['linear_distance'] =$quake['angular_distance'] * 111.32;  // calculate linear distance in km

// trave time based on best fit equation for arrival of p-wave - seems to work
$quake['travel_time'] = 0.0000048 * pow($quake['angular_distance'],3) - 0.0015881 * pow($quake['angular_distance'],2) + 0.2487721 *$quake['angular_distance'];

Any clues would be much appreciated - however I am very new to this

Many Thanks

Graham

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Re: Trying to get property of non-object in php

I would add the following line

$shakes = json_decode($events->CallAPI('GET', $url,$data));

var_dump($shakes); exit(); And you should get more information (possible it will say that$shakes is null)

Average of ratings: -