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+--- انجمن: PHP Forum (http://parsicoders.com/forumdisplay.php?fid=48)
+--- موضوع: بررسی صحت وجود ایمیل؛لینک و تصویر در اینترنت (/showthread.php?tid=1748)
بررسی صحت وجود ایمیل؛لینک و تصویر در اینترنت - Ghoghnus - 02-03-2012
چند نمونه از بهترین کدهای PHP جهت بررسی وجود لینک ها؛عکس ها و آدرس های ایمیل را بصورت توابع آماده کرده ایم که مطمئنا برای دوستان مفید خواهد بود ...
۱-بررسی وجود یک تصویر در وب سایت دیگر:
کد پی‌اچ‌پی:
$external_link = 'www.example.com/example.jpg';
if (@GetImageSize($external_link) ) {
echo "image exists";
} else {
echo "image does not exist";
}
کد پی‌اچ‌پی:
function checkRemoteFile($url)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
// don't download content
curl_setopt($ch, CURLOPT_NOBODY, ۱);
curl_setopt($ch, CURLOPT_FAILONERROR, ۱);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, ۱);
if(curl_exec($ch)!==FALSE)
{
return true;
}
else
{
return false;
}
}
کد پی‌اچ‌پی:
**
function url_exists($url) {
if(@file_get_contents($url,۰,N ULL,۰,۱))
{return ۱;}
else
{ return ۰;}
}
۲-بررسی وجود یک URL
کد پی‌اچ‌پی:
function url_exists($url){
if(strstr($url, "")) $url = str_replace("", "", $url);
$fp = @fsockopen($url, ۸۰);
if($fp === false) return false;
return true;
}
**
کد پی‌اچ‌پی:
function url_exists($url){
if ((strpos($url, "http")) === false) $url = "" . $url;
if (is_array(@get_headers($url)))
return true;
else
return false;
}
**
کد پی‌اچ‌پی:
function is_valid_url($url)
{
$url = @parse_url($url);
if (!$url)
{
return false;
}
$url = array_map('trim', $url);
$url['port'] = (!isset($url['port'])) ? ۸۰ : (int)$url['port'];
$path = (isset($url['path'])) ? $url['path'] : '';
if ($path == '')
{
$path = '/';
}
$path .= (isset($url['query'])) ? "?$url[query]" : '';
if (isset($url['host']) AND $url['host'] != gethostbyname($url['host']))
{
if (PHP_VERSION >= ۵)
{
$headers = get_headers("$url[scheme]:// $url[host]:$url[port]$path");
}
else
{
$fp = fsockopen($url['host'], $url['port'], $errno, $errstr, ۳۰);
if (!$fp)
{
return false;
}
fputs($fp, "HEAD $path HTTP/۱.۱\r\nHost: $url[host]\r\n\r\n");
$headers = fread($fp, ۴۰۹۶);
fclose($fp);
}
$headers = (is_array($headers)) ? implode("\n", $headers) : $headers;
return (bool)preg_match('#^HTTP/.*\ s+[(۲۰۰|۳۰۱|۳۰۲)]+\s#i', $headers);
}
return false;
}
کد پی‌اچ‌پی:
**
function image_exist($url) {
if (@fclose(@fopen( $url, "r"))) {
// true;
} else {
// false;
}
}
۳-بررسی صحت وجود یک آدرس ایمیل
کد پی‌اچ‌پی:
function email_exist($email) {
list($userid, $domain) = split("@", $email);
if (checkdnsrr($domain, "MX")) { return true;} else { return false;}
}
کد پی‌اچ‌پی:
if(! function_exists('checkdnsrr'))
function checkdnsrr($hostName, $recType = '')
{
if(!empty($hostName)) {
if( $recType == '' ) $recType = "MX";
exec("nslookup -type=$recType $hostName", $result);
// check each line to find the one that starts with the host
// name. If it exists then the function succeeded.
foreach ($result as $line) {
if(eregi("^$hostName",$line)) {
return true;
}
}
// otherwise there was no mail handler for the domain
return false;
}
return false;
}
**
کد پی‌اچ‌پی:
function check_email($email)
{
$email_error = false;
$Email = htmlspecialchars(stripslashes( strip_tags(trim($email)))); //parse unnecessary characters to prevent exploits
if ($Email == "") { email_error = true; }
elseif (!eregi("^([a-zA-Z۰-۹._-]) +@([a-zA-Z۰-۹._-])+\.([a-zA-Z۰-۹._-])([a-zA-Z۰-۹._-])+", $Email)) { email_error = true; }
else {
list($Email, $domain) = split("@", $Email, ۲);
if (! checkdnsrr($domain, "MX")) { email_error = true; }
else {
$array = array($Email, $domain);
$Email = implode("@", $array);
}
}
if (email_error) { return false; } else{return true;}
}
**
کد پی‌اچ‌پی:
function check_email($email)
{
$email_error = false;
$Email = htmlspecialchars(stripslashes( strip_tags(trim($email)))); //parse unnecessary characters to prevent exploits
if ($Email == "") { email_error = true; }
elseif (!eregi("^([a-zA-Z۰-۹._-]) +@([a-zA-Z۰-۹._-])+\.([a-zA-Z۰-۹._-])([a-zA-Z۰-۹._-])+", $Email)) { email_error = true; }
else {
list($Email, $domain) = split("@", $Email, ۲);
if (! checkdnsrr($domain, "MX")) { email_error = true; }
else {
$array = array($Email, $domain);
$Email = implode("@", $array);
}
}
if (email_error) { return false; } else{return true;}
}
function EmailValidation($email) {
if (check_email($email)) {
$domain = explode( "@", $email );
if ( @fsockopen ($domain[۱] ,۸۰,$errno,$errstr,۳)) {
$code = "here we place a secret key with the email address: $email";
mail($email, "Your Verification Code", "Please click the following URL to verify your email:\n\n ". $_SERVER['PHP_SELF']."/? v=$code&email=$email","From: \"example\" <example@example.com>");
echo "Your account needs to be verify. We have send you an email, click the link provided and you are verified.";
return true;
} else {
return false; //if a connection cannot be established return false
}
} else {
return false; //if email address is an invalid format return false
}
}
function EmailForm(){
if(empty($_POST['email'])){
echo "<form action=".$_SERVER['PHP_SELF'] ." method='post'>
<table border='۰'>
<tr>
<td>Email</td>
<td><input name='email' type='text' id='email' /></td>
</tr>
<tr>
<td> </td>
<td><input type='submit' name='Submit' value='Validate' /></td>
</tr>
</table>
</form>";
} elseif(isset($_POST['email'])) {
if(EmailValidation($_POST['ema il'])) {
echo "An email has been sent to you. Please follow the instructions to activate your account.";
} else {
echo "Your email address appears to be invalid. Please try again.";
}
}else elseif(isset($_GET['v']) && isset($_GET['email'])) {
$clean['emai'] = $_GET['email']; //need to ....... these data to be clean
$clean['v'] = $_GET['v']; //need to ....... these data to be clean
$code = "here we place a secret key with the email address: $email";
$code = md۵($code);
if ($clean['v'] != $code) {
echo "The Verification Code is invalid. Please Try Again.";
exit(۰);
}else
echo "The email ".$clean['emai']." has been verified";
}else {
echo "An error has occured, please contact the administrator.";
}
}
EmailForm();