How to Export MySQL Query Results as CSV in PHP Using Two Different Methods?

How to Export MySQL Query Results as CSV in PHP

Exporting data from a MySQL database as a CSV can be achieved through various methods. Here are two efficient approaches:

Using MySQL's SELECT INTO OUTFILE

This method allows you to directly export query results to a CSV file on the server:

$query = "SELECT * FROM my_table";
$csv_path = "c:/mydata.csv";
$result = mysql_query("SELECT * INTO OUTFILE '" . $csv_path . "' FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\"' LINES TERMINATED BY '\n' FROM my_table");

Creating a CSV Manually

Alternatively, you can create the CSV file manually using PHP:

$select = "SELECT * FROM table_name";
$export = mysql_query($select) or die("Sql error : " . mysql_error());

$fields = mysql_num_fields($export);

// Generate the header line with field names
for ($i = 0; $i < $fields; $i++) {
    $header .= mysql_field_name($export, $i) . "\t";
}

// Process each row of the query results
while ($row = mysql_fetch_row($export)) {
    $line = '';
    foreach ($row as $value) {
        if (empty($value)) {
            $value = "\t";
        } else {
            $value = str_replace('"', '""', $value);
            $value = '"' . $value . '"' . "\t";
        }
        $line .= $value;
    }
    $data .= trim($line) . "\n";
}

$data = str_replace("\r", "", $data);

// Set the HTTP headers for CSV download
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=your_desired_name.xls");
header("Pragma: no-cache");
header("Expires: 0");

// Output the CSV
print "$header\n$data";

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