Reading CSV files in PHP

read-csv.php

<?php
//An elegant way to read CSV data in PHP.
//Tested with PHP7
//BTW, you can quickly generate some test data at https://www.mockaroo.com/
error_reporting(-1);                                                                                                     
const CSV_FILE = "data.csv";                                                                                                
const CSV_MAP = array(                                                                                                      
        'serial',                                                                                                           
        'first-name',                                                                                                       
        'last-name'                                                                                                         
);                                                                                                                          
                                                                                                                            
class CsvUtils {                                                                                                            
        public static function readCsvFile($fileName, $callback) {                                                          
                try {                                                                                                       
                        $file = new \SplFileObject($fileName);                                                              
                } catch (\RuntimeException $e) {                                                                            
                        throw new \Exception("Cannot open $fileName");                                                      
                }                                                                                                           
                                                                                                                            
                while (!$file->eof()) {                                                                                     
                        $line = trim($file->fgets());                                                                       
                        if (empty($line)) {                                                                                 
                                continue;                                                                                   
                        }                                                                                                   
                                                                                                                            
                        $data = explode(",", $line);                                                                        
                        foreach ($data as &$d) {                                                                            
                                $d = trim($d);                                                                              
                        }                                                                                                   
                                                                                                                            
                        call_user_func($callback, $data);                                                                   
                }                                                                                                           
        }                                                                                                                   
}                                                                                                                           
                                                                                                                            
CsvUtils::readCsvFile(CSV_FILE, function($data) {                                                                           
        $data = array_combine(CSV_MAP, $data);                                                                              
        print_r($data);                                                                                                     
});