Create and download CSV in PHP

An example of creating a CSV with a line separator ";"

The code:

// 1
$fp = fopen('./fileName.csv', 'w');
if ($fp === false) {
// 2
exit('Can not create file (No Rights) ./fileName.csv');
}

// 3
$models = [
[
'name' => 'Visa',
'type' => 'Card',
'balance' => '10.0'
],
[
'name' => 'Master',
'type' => 'Card',
'balance' => '0'
]
];

// 4
fwrite($fp, '"Имя";"Тип";"Баланс"' . "\n");
foreach ($models as $v) {
fwrite($fp, '"' . $v['name'] . '";"'
. $v['type'] . '";"'
. $v['balance'] . '"'
. "\n");
}

// 5
fseek($fp, 0);
fclose($fp);

// 6
$data = file_get_contents('./fileName.csv');

// 7
header('Content-Type: text/csv'); // 7.1
header('Content-Disposition: attachment; filename="fileName.csv"'); // 7.2
header("Content-Transfer-Encoding: binary"); // 7.3
header('Expires: 0'); // 7.4
header('Pragma: no-cache'); // 7.5
header("Content-Length: ".strlen($data)); // 7.6

// 8
exit($data);

Note :

For the header to fire, there must be no BOM and no output of information before the code fires.

1 - Create a file fileName.csv in the root of the site for writing.

2 - We warn about an error if there are no rights to write.

3 - An array of values that we will process

4 - Writing to a file. '"Name ";" Type";"Balance"' . "\n" (";" - line separator, "\n" - line break).

5 - Return the pointer to the beginning of the file and close the file (save).

6 - Read the file again.

7 - We give headers for the ability to download the file.

7.1 - Parameter defining file type.

7.2 - Pointer to file attachment.

7.3 - In what form to transfer (in this case, in binary).

7.4, 7.5 - Pointer not to cache the file and constantly give the current one.

7.6 - The size of the content part of the file.

8 - We display information that, in conjunction with the headers, will make it possible to download it to a CSV file.

Result: