Created
June 5, 2011 13:36
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Convert a simple CSV File with PHP, list of different possible ways how to reformat a simple csv
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<?php | |
$start = microtime(true); | |
$fpIn = fopen('input.csv', 'r'); | |
$fpOut = fopen('output-pure.csv', 'w'); | |
while (($row = fgets($fpIn)) !== false) | |
{ | |
$fields = explode(";", $row); | |
fwrite($fpOut, | |
implode( | |
";", | |
array( | |
"name" => $fields[0], | |
"firstname name" => '"'.$fields[1] ." ". $fields[0].'"', | |
"kto" => $fields[2], | |
"blz" => $fields[3], | |
"amount" => $fields[4] | |
) | |
) | |
); | |
} | |
$end = microtime(true); | |
$duration = $end - $start; | |
echo "Duration: ".round($duration, 2) . "s".PHP_EOL; |
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<?php | |
$start = microtime(true); | |
$fpIn = fopen('input.csv', 'r'); | |
$fpOut = fopen('output.csv', 'w'); | |
while (($row = fgetcsv($fpIn, 0, ";")) !== false) | |
{ | |
fputcsv($fpOut, array( | |
"name" => $row[0], | |
"firstname name" => $row[1] ." ". $row[0], | |
"kto" => $row[2], | |
"blz" => $row[3], | |
"amount" => $row[4] | |
), ";"); | |
} | |
$end = microtime(true); | |
$duration = $end - $start; | |
echo "Duration: ".round($duration, 2) . "s".PHP_EOL; |
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<?php | |
// reformat the csv file via a filter | |
$start = microtime(true); | |
$fpIn = fopen('input.csv', 'r'); | |
$fpOut = fopen('output.csv', 'w'); | |
stream_filter_register("csvreformat", "csvreformat_filter"); | |
stream_filter_append($fpIn, "csvreformat"); | |
stream_copy_to_stream($fpIn, $fpOut); | |
$end = microtime(true); | |
$duration = $end - $start; | |
echo "Duration: ".round($duration, 2) . "s".PHP_EOL; | |
class csvreformat_filter extends php_user_filter { | |
private $remaining = ""; | |
function filter($in, $out, &$consumed, $closing) | |
{ | |
while ($bucket = stream_bucket_make_writeable($in)) | |
{ | |
$data = $this->remaining.$bucket->data; | |
$lastNewLine = strrpos($data, PHP_EOL); | |
$this->remaining = substr($data, $lastNewLine+1); | |
$data = substr($data, 0, $lastNewLine); | |
$bucket->data = ""; | |
foreach(explode(PHP_EOL, $data) as $row) | |
{ | |
$tmp = explode(";", $row); | |
$bucket->data .= $tmp[0].';"'.$tmp[1]." ".$tmp[0].'";'.$tmp[2].";".$tmp[3].";".$tmp[4].PHP_EOL; | |
} | |
$consumed += $bucket->datalen; | |
stream_bucket_append($out, $bucket); | |
} | |
return PSFS_PASS_ON; | |
} | |
} |
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<?php | |
$start = microtime(true); | |
$fp = fopen('input.csv', 'w'); | |
for ($i = 1; $i <= 1000000; $i++) | |
{ | |
$row = array( | |
"name" => someString(), | |
"firstname" => someString(), | |
"kto" => rand(1000000, 9999999), | |
"blz" => rand(1000000, 9999999), | |
"amount" => rand(1000000, 9999999) | |
); | |
fputcsv($fp, $row, ";"); | |
} | |
$end = microtime(true); | |
$duration = $end - $start; | |
echo "Duration: ".round($duration, 2) . "s".PHP_EOL; | |
function someString($length = 10) { | |
return substr(md5(rand()), 0, $length); | |
} |
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