problēmas ar email validation

yeahz · November 4, 2010

function isValidEmail($emailaddy) {
return eregi("^[a-z0-9_]+@[a-z0-9\-]+\.[a-z0-9\-\.]+$", $emailaddy);
}

ierakstot šādu emailu: v.b@inbox.lv rodas problēmas, saka ka nederīgs emails. Problēma ir punktā (v.b). Kā lai to izlabo?

briedis · November 4, 2010

Nevajag riteni gudrot no jauna...

http://php.net/manual/en/function.filter-var.php

/**
* Funkcija pārbauda e-pasta adreses korektumu
* @param string $mail
* @return bool True - ja valīda e-pasta adrese, savādāk false
*/
function validMail($mail){
return (bool)filter_var($mail, FILTER_VALIDATE_EMAIL);
}

Edited November 4, 2010 by briedis

yeahz · November 4, 2010

ok, paldies :)

Kemito · November 5, 2010

Es daru sekojoši vismaz.

if(!preg_match("/^[-0-9A-Z_\.]{1,50}@([-0-9A-Z_\.]+\.){1,50}([0-9A-Z]){2,4}$/i", $epasts)){
echo "Nekorekta ēpasta adrese";
}

Domājams ka šis ritenis ar der.

briedis · November 5, 2010

Es daru sekojoši vismaz.
if(!preg_match("/^[-0-9A-Z_\.]{1,50}@([-0-9A-Z_\.]+\.){1,50}([0-9A-Z]){2,4}$/i", $epasts)){
echo "Nekorekta ēpasta adrese";
}
Domājams ka šis ritenis ar der.

Viens no sūdīgākajiem e-pastu regexpiem kādi redzēti :)

$mails = array(
"...@inbox.lv",
"---@inbox.lv",
"....@....000",
"____@___.123",
"-@..11",
);
foreach($mails as $mail){
if(preg_match("/^[-0-9A-Z_\.]{1,50}@([-0-9A-Z_\.]+\.){1,50}([0-9A-Z]){2,4}$/i", $mail)){
	echo "Labs e-pasts: $mail<br/>";
}
}

Rezultātā:

Labs e-pasts: ...@inbox.lv

Labs e-pasts: ---@inbox.lv

Labs e-pasts: ....@....000

Labs e-pasts: ____@___.123

Labs e-pasts: -@..11

Varbūt tomēr labāk ir lietot php piedāvātos iebūvētos rīkus?

Maris-S · November 5, 2010

Tīri intereses pēc paskatījos kāda ir ātrdarbība un arī cik pareizi strādā. Kemito piedāvāto izteiksmi gan nācās nomainīt jo patiešām Briedis norādītos e-pasta variantus apstrādāja nekorekti, izteiksmi paņēmu no php.net komentāriem funkcijai preg_match. Interesanti tas ka preg_match strādā ātrāk, kaut gan sākumā domāju ka būs otrādāk.

Tātad ātruma pārbaude:

<?php
error_reporting(E_ALL);
ini_set('display_errors', 'on');

/**
* Simple function to replicate PHP 5 behaviour
*/
function microtime_float() {
   list($usec, $sec) = explode(" ", microtime());
   return ((float)$usec + (float)$sec);
}

function validMail($email){
       return (bool)filter_var($email, FILTER_VALIDATE_EMAIL);
}

function validMail2($email) {
return (bool)preg_match('/^([a-z0-9])(([-a-z0-9._])*([a-z0-9]))*\@([a-z0-9])(([a-z0-9-])*([a-z0-9]))+' . '(\.([a-z0-9])([-a-z0-9_-])?([a-z0-9])+)+$/i', $email);
}
?>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Mail</title>
</head>

<body>
<?php
set_time_limit(0);
$c = 10000;
$email = "mails@google.lv";

$time_start = microtime_float();
for ($i = 0; $i < $c; $i++)
validMail($email);
$time_end = microtime_float();
echo '<p>Filter_var izpildes laiks: '.($time_end - $time_start).' sekundes.</p>';

$time_start = microtime_float();
for ($i = 0; $i < $c; $i++)
validMail2($email);
$time_end = microtime_float();
echo '<p>Preg_match izpildes laiks: '.($time_end - $time_start).' sekundes.</p>';
?>
</body>
</html>

Rezultāts:

Filter_var izpildes laiks: 0.12879109382629 sekundes.

Preg_match izpildes laiks: 0.023126125335693 sekundes.

Pie reizes āri pareizības pārbaude.

$mail_set = array(
"...@inbox.lv",
"---@inbox.lv",
"....@....000",
"____@___.123",
"-@..11      ",
);

echo('<pre>');
foreach ($mail_set as $email)
echo ($email . "     Filter_var - " . (validMail(trim($email)) ? "1" : "0") . "     preg_match - " . (validMail2(trim($email)) ? "1" : "0") . "<br>");
echo('</pre>');

Rezultāts:

...@inbox.lv     Filter_var - 0     preg_match - 0
---@inbox.lv     Filter_var - 1     preg_match - 0
....@....000     Filter_var - 0     preg_match - 0
____@___.123     Filter_var - 0     preg_match - 0
-@..11           Filter_var - 0     preg_match - 0

Domāju ka Filter_var pārbauda vēl kādas papildus lietas, tāpēc arī lēnāk strādā.

marcis · November 5, 2010

Ja nu ļoti gribas regexp :)

http://www.iamcal.com/publish/articles/php/parsing_email/

http://www.w3.org/Protocols/rfc822/

$qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
$dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
$atom  = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
$pair  = '\\x5c[\\x00-\\x7f]';
$domain_literal = "\\x5b($dtext|$pair)*\\x5d";
$quoted_string  = "\\x22($qtext|$pair)*\\x22";
$sub_domain     = "($atom|$domain_literal)";
$word           = "($atom|$quoted_string)";
$domain         = "$sub_domain(\\x2e$sub_domain)*";
$local_part     = "$word(\\x2e$word)*";
$expression     = "/^$local_part\\x40$domain$/D";

return (bool)preg_match($expression, $var);

Maris-S · November 5, 2010

Nē, domāju gan labāk izmantot php iebūvētās iespējas tādām pārbaudēm.

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