编辑表单以清除/验证电话号码 - Editing form to sanitize/validate phone number

我对PHP的经验非常有限，我真的希望有人能帮助我。

我想做的是对电话号码输入进行消毒/验证，以便只允许输入数字。

我想我需要使用FILTER_SANITIZE_NUMBER_INT，但我不确定在哪里或如何使用它。

下面是我的代码:

<?php
// Replace the email address with the one that should receive the contact form inquiries.
define('TO_EMAIL', '########');
$aErrors = array();
$aResults = array();
/* Functions */
function stripslashes_if_required($sContent) {
    if(get_magic_quotes_gpc()) {
        return stripslashes($sContent);
    } else {
        return $sContent;
    }
}
function get_current_url_path() {
    $sPageUrl = "http://".$_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
    $count = strlen(basename($sPageUrl));
    $sPagePath = substr($sPageUrl,0, -$count);
    return $sPagePath;
}
function output($aErrors = array(), $aResults = array()){ // Output JSON
    $bFormSent = empty($aErrors) ? true : false;
    $aCombinedData = array(
        'bFormSent' => $bFormSent,
        'aErrors' => $aErrors,
        'aResults' => $aResults
        );
    header('Content-type: application/json');
    echo json_encode($aCombinedData);
    exit;
}
// Check supported version of PHP
if (version_compare(PHP_VERSION, '5.2.0', '<')) { // PHP 5.2 is required for the safety filters used in this script
    $aErrors[] = 'Unsupported PHP version. <br /><em>Minimum requirement is 5.2.<br />Your version is '. PHP_VERSION .'.</em>';
    output($aErrors);
}

if (!empty($_POST)) { // Form posted?
    // Get a safe-sanitized version of the posted data
    $sFromEmail = filter_input(INPUT_POST, 'email', FILTER_SANITIZE_EMAIL);
    $sFromName = filter_input(INPUT_POST, 'name', FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW);
    $sMessage  = "Name: ".stripslashes_if_required($_POST['name']);
    $sMessage .= "'r'nEmail: ".stripslashes_if_required($_POST['email']);
    $sMessage .= "'r'nBusiness: ".stripslashes_if_required($_POST['business']); 
    $sMessage .= "'r'nAddress: ".stripslashes_if_required($_POST['address']);
    $sMessage .= "'r'nPhone: ".stripslashes_if_required($_POST['phone']);
    $sMessage .= "'r'nMessage: ".stripslashes_if_required($_POST['message']);
    $sMessage .= "'r'n--'r'nEmail sent from ". get_current_url_path();
    $sHeaders  = "From: '$sFromName' <$sFromEmail>"."'r'n";
    $sHeaders .= "Reply-To: '$sFromName' <$sFromEmail>";
    if (filter_var($sFromEmail, FILTER_VALIDATE_EMAIL)) { // Valid email format?
        $bMailSent = mail(TO_EMAIL, "New inquiry from $sFromName", $sMessage, $sHeaders);
        if ($bMailSent) {
            $aResults[] = "Message sent, thank you!";
        } else {
            $aErrors[] = "Message not sent, please try again later.";
        }
    } else {
        $aErrors[] = 'Invalid email address.';
    }
} else { // Nothing posted
    $aErrors[] = 'Empty data submited.';
}

output($aErrors, $aResults);

您看过PHP的preg_replace函数吗?您可以使用preg_replace('/[^0-9]/', '', $_POST['phone'])去掉任何非数字字符。

一旦你过滤掉了字符数据，你总是可以检查它是否符合你想要的长度:

$phone = preg_replace('/[^0-9]/', '', $_POST['phone']);
if(strlen($phone) === 10) {
    //Phone is 10 characters in length (###) ###-####
}

您也可以使用PHP的preg_match函数，如在另一个SO问题中所讨论的。

有几种方法可以做到这一点…例子:

// If you want to clean the variable so that only + - . and 0-9 can be in it you can:
$number = filter_var($number, FILTER_SANITIZE_NUMBER_INT);
// If you want to clean it up manually you can:
$phone = preg_replace('/[^0-9+-]/', '', $_POST['phone']);
// If you want to check the length of the phone number and that it's valid you can:
if(strlen($_POST['phone']) === 10) {
    if (!preg_match('/^[0-9-+]$/',$var)) { // error } else { // good }
}

显然，可能需要根据国家和其他杂项因素进行一些编辑。

您可以尝试使用preg_replace过滤掉任何非数字字符，然后您可以检查剩余内容的长度，看看它是否是电话号码(应该是7,9或10位数字)

// remove anything thats not a number from the string
function only_numbers($number) { return preg_replace('/[^0-9]/', '', $number) };
// test that the string is only 9 numbers long
function isPhone($number) { return strlen(only_numbers($number)) == 9; }

只要确保在验证后使用only_numbers值时使用它。

之