Iterate over a CSV file row-by-row without ever loading the whole file into memory. Uses a generator so consumers can foreach naturally and PHP cleans up the file handle.
PHP
<?php
function csvRows(string $path, string $sep = ',', string $enc = '"'): Generator {
$fh = fopen($path, 'r');
if ($fh === false) throw new RuntimeException("Cannot open $path");
try {
while (($row = fgetcsv($fh, 0, $sep, $enc, '\\')) !== false) {
yield $row;
}
} finally {
fclose($fh);
}
}
foreach (csvRows('big-export.csv') as $i => $row) {
if ($i === 0) continue; // skip header
// process $row — uses ~constant memory regardless of file size
}Save your own code snippets
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