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Editing: functions.php

<?php
// functions.php

/**
 * Formats and validates a phone number.
 *
 * @param string $phoneNumber The phone number to format.
 * @param string $countryCode The country code (e.g., +1, +44, +255).
 * @return string|false The formatted phone number or false if invalid.
 */
function formatPhoneNumber($phoneNumber, $countryCode) {
    // Ensure the country code starts with a '+'
    if (strpos($countryCode, '+') !== 0) {
        $countryCode = '+' . $countryCode;
    }

// Remove any non-numeric characters from the phone number
    $phoneNumber = preg_replace('/[^0-9]/', '', $phoneNumber);

// Remove leading zero if it exists
    if (strpos($phoneNumber, '0') === 0) {
        $phoneNumber = substr($phoneNumber, 1);
    }

// Add country code if it's missing
    if (strpos($phoneNumber, $countryCode) !== 0) {
        $phoneNumber = $countryCode . $phoneNumber;
    }

// Validate the phone number format
    if (!preg_match('/^\+\d{6,15}$/', $phoneNumber)) {
        return false; // Invalid format
    }

return $phoneNumber;
}

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