return ["valid" => false, "email" => $email];
| Method | What it Checks | Pros | Cons | | :--- | :--- | :--- | :--- | | | Syntax (text format) | Fast, standardized, built-in. | Does not check if email exists. | | checkdnsrr() | Domain validity (MX Records) | Catches fake domains (e.g., user@fake-site.com). | Slower (requires DNS lookup); does not validate the user. | | Verification Email | Real existence | The only 100% way to validate an email. | Requires user action; higher friction. | validate email address php
return false;
<?php $email = "user@example.com";
Most simple Regex patterns will reject valid emails like user+tag@gmail.com or newer domains like .photography . Stick to filter_var() unless you have a specific reason not to. 3. Beyond Syntax: Checking if the Domain Exists return ["valid" => false, "email" => $email]; |
return ["valid" => false, "email" => $email];
| Method | What it Checks | Pros | Cons | | :--- | :--- | :--- | :--- | | | Syntax (text format) | Fast, standardized, built-in. | Does not check if email exists. | | checkdnsrr() | Domain validity (MX Records) | Catches fake domains (e.g., user@fake-site.com). | Slower (requires DNS lookup); does not validate the user. | | Verification Email | Real existence | The only 100% way to validate an email. | Requires user action; higher friction. |
return false;
<?php $email = "user@example.com";
Most simple Regex patterns will reject valid emails like user+tag@gmail.com or newer domains like .photography . Stick to filter_var() unless you have a specific reason not to. 3. Beyond Syntax: Checking if the Domain Exists