Iterate through lines in an external file with PHP

PHP csv file reader by line

<?php
$file = new SplFileObject("animals.csv");
$file->setFlags(SplFileObject::READ_CSV);
foreach ($file as $row) {
    list($animal, $class, $legs) = $row;
    printf("A %s is a %s with %d legs\n", $animal, $class, $legs);
}
?>

#Contents of animals.csv

crocodile,reptile,4
dolphin,mammal,0
duck,bird,2
koala,mammal,4
salmon,fish,0

#The above example will output something similar to:

A crocodile is a reptile with 4 legs
A dolphin is a mammal with 0 legs
A duck is a bird with 2 legs
A koala is a mammal with 4 legs
A salmon is a fish with 0 legs

PHP file reader by line

$filename = 'myfile.csv';

$file = new SplFileObject($filename);
while (!$file->eof()){
     $line = $file->current();
     $file->next();
}                                                                                                                                              

while (!$file->eof()) repeats the last line because you don't see the eof until the read.
while($line = $file->current()) works better. It combines the read and the test.