98 lines
2.4 KiB
PHP
98 lines
2.4 KiB
PHP
<?php
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/**
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* Shows how to query data into `FluxTable`
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*/
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require __DIR__ . '/../vendor/autoload.php';
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use InfluxDB2\Client;
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use InfluxDB2\Model\DeletePredicateRequest;
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use InfluxDB2\Point;
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use InfluxDB2\Service\DeleteService;
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$org = 'my-org';
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$bucket = 'my-bucket';
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$token = 'my-token';
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//
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// Creating client
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//
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$client = new Client([
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"url" => "http://localhost:8086",
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"token" => $token,
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"bucket" => $bucket,
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"org" => $org,
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"precision" => InfluxDB2\Model\WritePrecision::S
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]);
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//
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// Delete data from influxDB
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//
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$service = $client->createService(DeleteService::class);
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$predicate = new DeletePredicateRequest();
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$predicate->setStart(DateTime::createFromFormat('Y', '1900'));
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$predicate->setStop(new DateTime());
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$predicate->setPredicate("_measurement=\"weather\"");
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$service->postDelete($predicate, null, $org, $bucket);
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//
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// Write test data into InfluxDB
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//
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$writeApi = $client->createWriteApi();
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$pointArray = [];
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$dateNow = new DateTime('NOW');
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for ($i = 1; $i <= 10; $i++) {
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$point = Point::measurement("weather")
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->addTag("location", "London")
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->addField("temperature", rand(-5, 20))
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->time($dateNow->getTimestamp());
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$pointArray[] = $point;
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$dateNow->sub(new DateInterval('P1D'));
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}
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$writeApi->write($pointArray);
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$writeApi->close();
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//
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// Get query client
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//
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$queryApi = $client->createQueryApi();
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//
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// Synchronously executes query and return result as an Array of FluxTables
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//
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$result = $queryApi->query(
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'from(bucket: "my-bucket")
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|> range(start: -8d)
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|> filter(fn: (r) => r["_measurement"] == "weather")'
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);
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//
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// Encoding to JSON with json_encode
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//
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printf("\n\n----------------------- Query (JsonEncode) -----------------------\n\n");
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echo json_encode($result, JSON_PRETTY_PRINT);
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//
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// Working with returned data in FluxTables
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//
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printf("\n\n----------------------- Query (FluxTables) -----------------------\n\n");
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foreach ($result as $table) {
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foreach ($table->records as $record) {
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$location = $record["location"];
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$temperature = $record->getValue();
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try {
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$time = (new DateTime($record->getTime()))->format('d.m.Y');
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} catch (Exception $e) {
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$time = $record->getTime();
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}
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$measurement = $record->getMeasurement();
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print "$measurement in $location at $time - Temperature is $temperature °C\n";
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}
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}
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$client->close();
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