What are some best practices for reading and processing non-standard CSV files in PHP?

When working with non-standard CSV files in PHP, it is important to handle the variations in the file format to ensure successful reading and processing. One approach is to use the fgetcsv() function with custom delimiter, enclosure, and escape characters to parse the file correctly. Additionally, checking for and handling any potential errors or inconsistencies in the data can help prevent issues during processing.

$filename = 'non_standard_file.csv';
$delimiter = ';'; // Custom delimiter
$enclosure = '"'; // Custom enclosure
$escape = "\\"; // Custom escape character

if (($handle = fopen($filename, 'r')) !== false) {
    while (($data = fgetcsv($handle, 0, $delimiter, $enclosure, $escape)) !== false) {
        // Process the CSV data
        print_r($data);
    }
    fclose($handle);
} else {
    echo "Error opening file.";
}