exemplo-01.php

<?php 

	$filename = "usuarios.csv";

	if (file_exists($filename)) {
		$file = fopen($filename, "r");

		$headers = explode(",", fgets($file));

		$data = array();

		while ($row = fgets($file)) {
			$rowData = explode(",", $row);
			$line = array();

			for ($i=0; $i < count($headers); $i++) { 
				$line[$headers[$i]] = $rowData[$i];
			}

			array_push($data, $line);
		}

		fclose($file);

		echo json_encode($data);
	}


 ?>