What is the best way to format and highlight specific parts of an IBAN number in PHP?

When working with IBAN numbers in PHP, it may be necessary to format and highlight specific parts of the number for better readability or validation purposes. One way to achieve this is by using regular expressions to match and extract the desired parts of the IBAN number. By capturing specific groups within the IBAN number, you can then format or highlight them as needed. 

$iban = 'GB29 NWBK 6016 1331 9268 19';

// Use regular expression to match and extract specific parts of the IBAN number
if (preg_match('/^([A-Z]{2})(\d{2})(\w{4})(\w{4})(\w{4})(\w{4})(\w{2})$/', $iban, $matches)) {
    $countryCode = $matches[1];
    $checkDigits = $matches[2];
    $bankCode = $matches[3];
    $branchCode = $matches[4];
    $accountNumber = $matches[5];
    $highlightedDigits = $matches[6];
    
    // Format and highlight specific parts of the IBAN number
    $formattedIban = $countryCode . ' ' . $checkDigits . ' ' . $bankCode . ' ' . $branchCode . ' ' . $accountNumber . ' <span style="background-color: yellow;">' . $highlightedDigits . '</span>';
    
    echo $formattedIban;
}

Keywords

PHP IBAN number formatting highlighting regular expressions

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