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email validation php

Brenda Reed 
<?php
   $email = "[email protected]";
   // Validate email
   if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
      echo("$email is a valid email address");
   }
   else{
      echo("$email is not a valid email address");
   }
?>
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3.5
6
Liam W 85 points 

                                    // E-mail Code Validation using a four digit number: 
// var.inc.php: 
&lt;?php 
session_start();
$x = mt_rand(1000,9999);
// index.php: 
&lt;?php 
include_once 'var.inc.php';
$_SESSION['key'] = $x;
if(isset($_POST['submit'])){
    if(!mail($_POST['email-in'], &quot;Verify&quot;, &quot;Code: &quot;. $x)){
        echo &quot;ERROR EMAIL&quot;;
    }else{
        header(&quot;Location: validate.php&quot;);
    }
}
?&gt;
&lt;!DOCTYPE html&gt;
&lt;html lang=&quot;en&quot;&gt;
&lt;head&gt;
    &lt;meta charset=&quot;UTF-8&quot;&gt;
    &lt;meta http-equiv=&quot;X-UA-Compatible&quot; content=&quot;IE=edge&quot;&gt;
    &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot;&gt;
    &lt;title&gt;Validate email&lt;/title&gt;
&lt;/head&gt; 
&lt;body&gt;
    &lt;form action=&quot;&quot; method=&quot;post&quot;&gt;
        &lt;input type=&quot;email&quot; placeholder=&quot;email&quot; name=&quot;email-in&quot;&gt;
        &lt;button id=&quot;submit&quot; type=&quot;submit&quot; name=&quot;submit&quot;&gt;Submit&lt;/button&gt;
    &lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
// validate.php: 
  &lt;?php session_start();?&gt;
&lt;!DOCTYPE html&gt;
&lt;html lang=&quot;en&quot;&gt;
&lt;head&gt;
    &lt;meta charset=&quot;UTF-8&quot;&gt;
    &lt;meta http-equiv=&quot;X-UA-Compatible&quot; content=&quot;IE=edge&quot;&gt;
    &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot;&gt;
    &lt;title&gt;Validate&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;form action=&quot;&quot; method=&quot;post&quot;&gt;
        &lt;input type=&quot;number&quot; name=&quot;user-key&quot;&gt;
        &lt;button type=&quot;submit&quot; name=&quot;submit-user-key&quot;&gt;Validate&lt;/button&gt;
    &lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
&lt;?php 
    if(isset($_POST['submit-user-key'])){
        if($_POST['user-key'] == $_SESSION['key']){
            //Do something
        }
    }
?&gt;

3.5 (6 Votes)
0
3.57
7
KoKo 100 points 

                                    $pattern = '/^(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){255,})(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){65,}@)(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22))(?:\\.(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x22(?:[\\x01-\\x08\\x0B\\x0C\\x0E-\\x1F\\x21\\x23-\\x5B\\x5D-\\x7F]|(?:\\x5C[\\x00-\\x7F]))*\\x22)))*@(?:(?:(?!.*[^.]{64,})(?:(?:(?:xn--)?[a-z0-9]+(?:-+[a-z0-9]+)*\\.){1,126}){1,}(?:(?:[a-z][a-z0-9]*)|(?:(?:xn--)[a-z0-9]+))(?:-+[a-z0-9]+)*)|(?:\\[(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){7})|(?:(?!(?:.*[a-f0-9][:\\]]){7,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,5})?)))|(?:(?:IPv6:(?:(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){5}:)|(?:(?!(?:.*[a-f0-9]:){5,})(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3})?::(?:[a-f0-9]{1,4}(?::[a-f0-9]{1,4}){0,3}:)?)))?(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))(?:\\.(?:(?:25[0-5])|(?:2[0-4][0-9])|(?:1[0-9]{2})|(?:[1-9]?[0-9]))){3}))\\]))$/iD';

$emailaddress = '[email protected]';

if (preg_match($pattern, $emailaddress) === 1) {
    // emailaddress is valid
}

3.57 (7 Votes)
0
3.5
4
Jim Hughes 115 points 

                                    $email = &quot;[email protected]&quot;;

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
  $emailErr = &quot;Email invalide&quot;;
}

3.5 (4 Votes)
0
0
9
Sab669 135 points 

                                    $email = $_POST[&quot;email&quot;];
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
  $emailErr = &quot;Invalid email format&quot;;
}

0
0
5
1
Rufus 110 points 

                                    filter_var($email, FILTER_VALIDATE_EMAIL)

5 (1 Votes)
0
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