How to split array to multiple csv files using PHP - php

Question

Help!
I want to make this part of code shorter and more transformative. My $named array looks like:
Array
(
[0] => Array
(
[0] => Array
(
[0] => Header
)
[1] => Array
(
[0] => some text
[1] => some text
)
)
[1] => Array
(
[0] => Array
(
[0] => Header
)
[1] => Array
(
[0] =>
[1] => some text
)
[2] => Array
(
[0] => some text
)
)
)
So, I would like to save to a new csv file if the number of "header" exceeds 100. How can I open and close a file with the correct index without having to manually type "/named_1" or "/named_2"? At the moment I have a y variable that goes through the $named array and writes to the file until there are 100 headers. How can I not repeat the code?
Also each line must have a total of 38 semicolons.
$file = fopen(__DIR__ . '/named_1.csv', 'w');
$file_2 = fopen(__DIR__ . '/named_2.csv', 'w');
$file_3 = fopen(__DIR__ . '/named_3.csv', 'w');
$y=0;
foreach ($named as $array) {
foreach($array as $row){
if($y < 100){
$line = '';
for ($i=0; $i <= 38; $i++) {
if (count($row) > $i) {
$line .= $row[$i];
($i != 38 ? $line .= ';' : '');
} else {
($i != 38 ? $line .= ';' : '');
}
}
fwrite($file, $line.PHP_EOL);
}
if($y > 99 && $y <200){
$line = '';
for ($i=0; $i <= 38; $i++) {
if (count($row) > $i) {
$line .= $row[$i];
($i != 38 ? $line .= ';' : '');
} else {
($i != 38 ? $line .= ';' : '');
}
}
fwrite($file_2, $line.PHP_EOL);
}
if($y > 199 && $y <300){
$line = '';
for ($i=0; $i <= 38; $i++) {
if (count($row) > $i) {
$line .= $row[$i];
($i != 38 ? $line .= ';' : '');
} else {
($i != 38 ? $line .= ';' : '');
}
}
fwrite($file_3, $line.PHP_EOL);
}
}
$y++;
}
fclose($file);
touch( __DIR__ . '/named_1.csv');
fclose($file_2);
touch( __DIR__ . '/named_2.csv');
fclose($file_3);
touch( __DIR__ . '/named_3.csv');

Answer 1

Please try the following code. I added a function for composing filename for different needs.
function composeFilename($k, $mod, $type=1)
{
switch($type)
{
// for named_1-100.csv, named_101-200.csv, ...
case 1:
$from = $k - $mod + 2;
$to = $k+1;
$suffix = $from . "_" .$to;
break;
// for named_0-99.csv, named_100-199.csv, ...
case 2:
$from = $k - $mod + 1;
$to = $k;
$suffix = $from . "_" .$to;
break;
// for named_1.csv, named_2.csv, ...
default:
$suffix = ($k % $mod)+1;
}
return "named_$suffix.csv";
}
$lines = [];
$mod = 100;// The max number of rows in each output file
$outputDirectory = __DIR__ . "/";
$lastIndex = count($named) - 1;
foreach ($named as $k => $array){
foreach($array as $row){
$lines[] = trim(implode(";", $row));
}
// Write output file for every $mod lines or for the rest
if(($k+1) % $mod == 0 || $k == $lastIndex){
$filename = $outputDirectory . composeFilename($k, $mod);
if(file_put_contents($filename, implode(PHP_EOL, $lines))){
// Reset lines array for the next chunk
$lines = [];
}
else {
die("$filename could not be saved.");
}
}
}