Compare Values in multiple arrays - php

Question

I've been stuck on trying to figure this out for a few hours now.
I'm using cURL and PHP to get data from an API and then display that data in a table. I have my table setup to show start position of a race, where they finished, the name of the person, and how far behind they finished.
In my column for how far behind they finished the API doesn't take into account that somebody might not complete all the laps in the race. For example 2nd place finished 4.285 seconds behind the leader, but 14th place finished 0.929 behind the leader because they were a lap behind and in between the leader and second place.
I'm trying to figure out how to find the first position that didn't complete all the laps (this could be a different position for every race) and then every position after the first person a lap behind. If that makes sense.
Below is the API response and I'm trying to compare data from the ResultTime key.
{
"RequestValid": 1,
"ItemsReturned": 1,
"Classes": [
{
"Races": [
{
"RaceName": "Feature",
"RaceType": "Feature",
"RaceOrder": 1,
"RaceLevel": "A",
"RaceLaps": 50,
"RaceTime": "00:27:39.532",
"RacePresenter": "",
"RaceNotes": "",
"RaceStatus": "Completed",
"Results": [
{
"ResultPlace": 1,
"ResultStart": 4,
"ResultTime": "1659.532",
"ResultCarNum": "49",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 2,
"ResultStart": 2,
"ResultTime": "1663.817",
"ResultCarNum": "1",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 3,
"ResultStart": 7,
"ResultTime": "1664.368",
"ResultCarNum": "28",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 4,
"ResultStart": 13,
"ResultTime": "1664.544",
"ResultCarNum": "1T",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 5,
"ResultStart": 1,
"ResultTime": "1665.218",
"ResultCarNum": "7",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 6,
"ResultStart": 8,
"ResultTime": "1666.842",
"ResultCarNum": "01",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 7,
"ResultStart": 10,
"ResultTime": "1668.640",
"ResultCarNum": "14",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 8,
"ResultStart": 15,
"ResultTime": "1670.214",
"ResultCarNum": "8",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 9,
"ResultStart": 21,
"ResultTime": "1672.037",
"ResultCarNum": "111V",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 10,
"ResultStart": 9,
"ResultTime": "1674.171",
"ResultCarNum": "44",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 11,
"ResultStart": 17,
"ResultTime": "1674.247",
"ResultCarNum": "16",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 12,
"ResultStart": 19,
"ResultTime": "1674.732",
"ResultCarNum": "72",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 13,
"ResultStart": 23,
"ResultTime": "1675.363",
"ResultCarNum": "99B",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 14,
"ResultStart": 16,
"ResultTime": "1660.461",
"ResultCarNum": "10",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 15,
"ResultStart": 24,
"ResultTime": "1663.480",
"ResultCarNum": "B1",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 16,
"ResultStart": 22,
"ResultTime": "1666.772",
"ResultCarNum": "7R",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 17,
"ResultStart": 6,
"ResultTime": "1669.867",
"ResultCarNum": "20",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 18,
"ResultStart": 14,
"ResultTime": "1673.277",
"ResultCarNum": "111",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 19,
"ResultStart": 12,
"ResultTime": "1387.076",
"ResultCarNum": "19R",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 20,
"ResultStart": 20,
"ResultTime": "1353.423",
"ResultCarNum": "0H",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 21,
"ResultStart": 5,
"ResultTime": "1340.342",
"ResultCarNum": "11",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 22,
"ResultStart": 11,
"ResultTime": "1284.877",
"ResultCarNum": "76",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 23,
"ResultStart": 3,
"ResultTime": "962.947",
"ResultCarNum": "39",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 24,
"ResultStart": 18,
"ResultTime": "239.697",
"ResultCarNum": "23B",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
},
{
"ResultPlace": 25,
"ResultStart": 25,
"ResultTime": "156.942",
"ResultCarNum": "42",
"ResultDNF": 0,
"ResultDNS": 0,
"ResultDQ": 0,
}
]
},
]
}
UPDATE 2 to show code
foreach ($raceresults as $raceresult) {
//Checking if race has a time
if ($raceresult['ResultTime'] == "0.000") {
$racetime = "No Time";
$laptimebehindpadded = "No Time";
} else {
//Getting Time of Race
$racetime = $raceresult['ResultTime'];
//Taking leaders overall time and subtracting each position to get time behind.
$laptimebehind = $quicktime - $racetime;
//Converting time behind to show 3 decimal places
$laptimebehindpadded = sprintf('%0.3f', $laptimebehind);
}
}
echo $laptimebehindpadded;

Answer 1

Have a $priorResultTime = 0 and a $lapBehind = 0. As you foreach() through the result array, compare $result['ResultTime'] with $priorResultTime.
$priorResultTime = 0;
$lapBehind = 0;
foreach(... as $result) {
if ($result['ResultTime'] < $priorResultTime) {
$lapBehind++;
}
$priorResultTime = $result['ResultTime'];
}
Your output can now take advantage of the $lapBehind variable, and indicate how many laps behind the leader a racer was, along with their relative time.