influxdb_send.php

<?php

$data = array(
    [
        'measurement' => 'time',
        'tags' => [
            "host" => 'server02',
        ],
        'fields' => ['value' => mt_rand(1, 100)],
        'timestamp' => exec('date +%s%N')
    ]
);

// <measurement>[,<tag_key>=<tag_value>[,<tag_key>=<tag_value>]] <field_key>=<field_value>[,<field_key>=<field_value>] [<timestamp>]
function influxdb_send($url, $db, $data) {
    $points = [];
    foreach ($data as $metric) {
        $tags = []; // tags array
        $fields = []; // fields array
        foreach ($metric['tags'] as $tag => $value) {
            $tags[]="$tag=$value";
        }
        foreach ($metric['fields'] as $tag => $value) {
            $fields[]="$tag=$value";
        }
        if(empty($metric['timestamp'])) {
            $metric['timestamp'] = exec('date +%s%N');
        }
        $point = [implode(',', $tags), implode(',', $fields), $metric['timestamp']];
        $points[]=$metric['measurement'] . ',' . implode(' ', $point);
    }

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url . "write?db=" . $db);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, implode("\n", $points)); 
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: text/plain')); 
    $result=curl_exec($ch);
    return $result;
}

// influxdb_send('http://127.0.0.1:8086/', 'test', $data);