segment_test.php

<?php 

// Include the segment library from https://github.com/segmentio/analytics-php
include 'path_to_segment.php';

// Initialize with segment's defaults and simple error logging
Segment::init('WRITE_KEY_HERE', [
    "error_handler" => function ($code, $msg) { error_log("Segment error:$code $msg"); },
]);

$event = 'test_event';

/// Extra big parameters list
$parameters = [];
for($i=0;$i<300;$i++) {
    $parameters[] = str_random();
}
                         
// Track 50 events                     
for($i=0;$i<50;$i++) {
	$data = [
            'userId'     => 1425,
            'event'      => $event,
            'properties' => $parameters,
            'timestamp'  => time(),
            'context'    => [
                'active' => false,
                'traits' => [
                    'email'      => '[email protected]',
                    'name'       => 'Will Washburn',
                    'created_at' => 1371245335,
                ],
            ],
        ];
      
	Segment::track($data);
}

/*
 * Generate a "random" alpha-numeric string.
 *
 * Should not be considered sufficient for cryptography, etc.
 *
 * @param  int  $length
 * @return string
 */
public static function str_random($length = 16)
{
	$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
	
	return substr(str_shuffle(str_repeat($pool, $length)), 0, $length);
}