How to read and write CSV files in PHP?

To read and write CSV files in PHP, you can use the built-in functions fgetcsv() for reading and fputcsv() for writing. Here is an example of reading a CSV file:

$filename = 'data.csv';

// Open the file for reading
$file = fopen($filename, 'r');

// Read the header row
$headers = fgetcsv($file);

// Initialize an empty data array
$data = [];

// Read the remaining rows
while (($row = fgetcsv($file)) !== false) {
    // Add each row to the data array
    $data[] = $row;
}

// Close the file
fclose($file);

// Print the data array
print_r($data);

This code opens the CSV file, reads the header row, and then reads the remaining rows one by one. Each row is added to the $data array. Finally, the file is closed and the data array is printed.

And here is an example of writing data to a CSV file:

$filename = 'data.csv';

// Open the file for writing
$file = fopen($filename, 'w');

// Write the header row
$headers = ['Name', 'Email', 'Phone'];
fputcsv($file, $headers);

// Write the data rows
$data = [
    ['John Doe', '[email protected]', '1234567890'],
    ['Jane Smith', '[email protected]', '0987654321']
];
foreach ($data as $row) {
    fputcsv($file, $row);
}

// Close the file
fclose($file);

This code opens the CSV file in write mode, writes the header row, and then writes each row of data using a foreach loop. Finally, the file is closed.

Note: Make sure you have appropriate read and write permissions for the file or directory you are working with.