Validate email in PHP<\/a> can be easily done by using filter_var() function with FILTER_VALIDATE_EMAIL filter. It will check if the format of the given email address is valid. But only this filter is not enough to check whether an email address exists. In this tutorial, we will show you how to check if an email address is real and exists using PHP.<\/p>\nIn the PHP email verification script<\/b>, we will validate an email address by checking MX DNS Record and domain. This script is very useful to verify the user’s email address before sending an email or insert in the database. You can differentiate real and invalid email address, and accept only the valid email address from the user.<\/p>\nPHP Email Verification Library<\/h2>\n
The VerifyEmail class is used to check if an email address is valid and real using SMTP protocol in PHP. You need to use one function of VerifyEmail class to verify the email address in PHP.<\/p>\n
check()<\/b> <\/p>\n\n- Validate the format of the email address.<\/li>\n
- Get MX records of the domain of the email address. <\/li>\n
- Connect to the SMTP server by the MX records.<\/li>\n
- Based on the response code:\n
\n- Check if given recipient email address is valid. <\/li>\n
- Check if the user of email’s domain exists.<\/li>\n
- Check the delivery of the message.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
<?php
<\/span>\/**
* Class to validate the email address
*
* @author CodexWorld.com <contact@codexworld.com>
* @copyright Copyright (c) 2018, CodexWorld.com
* @url https:\/\/www.codexworld.com
*\/
<\/span>class <\/span>VerifyEmail <\/span>{
protected <\/span>$stream <\/span>= <\/span>false<\/span>;
<\/span>\/**
* SMTP port number
* @var int
*\/
<\/span>protected <\/span>$port <\/span>= <\/span>25<\/span>;
<\/span>\/**
* Email address for request
* @var string
*\/
<\/span>protected <\/span>$from <\/span>= <\/span>'root@localhost'<\/span>;
<\/span>\/**
* The connection timeout, in seconds.
* @var int
*\/
<\/span>protected <\/span>$max_connection_timeout <\/span>= <\/span>30<\/span>;
<\/span>\/**
* Timeout value on stream, in seconds.
* @var int
*\/
<\/span>protected <\/span>$stream_timeout <\/span>= <\/span>5<\/span>;
<\/span>\/**
* Wait timeout on stream, in seconds.
* * 0 - not wait
* @var int
*\/
<\/span>protected <\/span>$stream_timeout_wait <\/span>= <\/span>0<\/span>;
<\/span>\/**
* Whether to throw exceptions for errors.
* @type boolean
* @access protected
*\/
<\/span>protected <\/span>$exceptions <\/span>= <\/span>false<\/span>;
<\/span>\/**
* The number of errors encountered.
* @type integer
* @access protected
*\/
<\/span>protected <\/span>$error_count <\/span>= <\/span>0<\/span>;
<\/span>\/**
* class debug output mode.
* @type boolean
*\/
<\/span>public <\/span>$Debug <\/span>= <\/span>false<\/span>;
<\/span>\/**
* How to handle debug output.
* Options:
* * `echo` Output plain-text as-is, appropriate for CLI
* * `html` Output escaped, line breaks converted to `<br>`, appropriate for browser output
* * `log` Output to error log as configured in php.ini
* @type string
*\/
<\/span>public <\/span>$Debugoutput <\/span>= <\/span>'echo'<\/span>;
<\/span>\/**
* SMTP RFC standard line ending.
*\/
<\/span>const <\/span>CRLF <\/span>= <\/span>\"\\r\\n\"<\/span>;
<\/span>\/**
* Holds the most recent error message.
* @type string
*\/
<\/span>public <\/span>$ErrorInfo <\/span>= <\/span>''<\/span>;
<\/span>\/**
* Constructor.
* @param boolean $exceptions Should we throw external exceptions?
*\/
<\/span>public function <\/span>__construct<\/span>(<\/span>$exceptions <\/span>= <\/span>false<\/span>) {
<\/span>$this<\/span>-><\/span>exceptions <\/span>= (boolean) <\/span>$exceptions<\/span>;
}
<\/span>\/**
* Set email address for SMTP request
* @param string $email Email address
*\/
<\/span>public function <\/span>setEmailFrom<\/span>(<\/span>$email<\/span>) {
if (!<\/span>self<\/span>::<\/span>validate<\/span>(<\/span>$email<\/span>)) {
<\/span>$this<\/span>-><\/span>set_error<\/span>(<\/span>'Invalid address : ' <\/span>. <\/span>$email<\/span>);
<\/span>$this<\/span>-><\/span>edebug<\/span>(<\/span>$this<\/span>-><\/span>ErrorInfo<\/span>);
if (<\/span>$this<\/span>-><\/span>exceptions<\/span>) {
throw new <\/span>verifyEmailException<\/span>(<\/span>$this<\/span>-><\/span>ErrorInfo<\/span>);
}
}
<\/span>$this<\/span>-><\/span>from <\/span>= <\/span>$email<\/span>;
}
<\/span>\/**
* Set connection timeout, in seconds.
* @param int $seconds
*\/
<\/span>public function <\/span>setConnectionTimeout<\/span>(<\/span>$seconds<\/span>) {
if (<\/span>$seconds <\/span>> <\/span>0<\/span>) {
<\/span>$this<\/span>-><\/span>max_connection_timeout <\/span>= (int) <\/span>$seconds<\/span>;
}
}
<\/span>\/**
* Sets the timeout value on stream, expressed in the seconds
* @param int $seconds
*\/
<\/span>public function <\/span>setStreamTimeout<\/span>(<\/span>$seconds<\/span>) {
if (<\/span>$seconds <\/span>> <\/span>0<\/span>) {
<\/span>$this<\/span>-><\/span>stream_timeout <\/span>= (int) <\/span>$seconds<\/span>;
}
}
public function <\/span>setStreamTimeoutWait<\/span>(<\/span>$seconds<\/span>) {
if (<\/span>$seconds <\/span>>= <\/span>0<\/span>) {
<\/span>$this<\/span>-><\/span>stream_timeout_wait <\/span>= (int) <\/span>$seconds<\/span>;
}
}
<\/span>\/**
* Validate email address.
* @param string $email
* @return boolean True if valid.
*\/
<\/span>public static function <\/span>validate<\/span>(<\/span>$email<\/span>) {
return (boolean) <\/span>filter_var<\/span>(<\/span>$email<\/span>, <\/span>FILTER_VALIDATE_EMAIL<\/span>);
}
<\/span>\/**
* Get array of MX records for host. Sort by weight information.
* @param string $hostname The Internet host name.
* @return array Array of the MX records found.
*\/
<\/span>public function <\/span>getMXrecords<\/span>(<\/span>$hostname<\/span>) {
<\/span>$mxhosts <\/span>= array();
<\/span>$mxweights <\/span>= array();
if (<\/span>getmxrr<\/span>(<\/span>$hostname<\/span>, <\/span>$mxhosts<\/span>, <\/span>$mxweights<\/span>) === <\/span>FALSE<\/span>) {
<\/span>$this<\/span>-><\/span>set_error<\/span>(<\/span>'MX records not found or an error occurred'<\/span>);
<\/span>$this<\/span>-><\/span>edebug<\/span>(<\/span>$this<\/span>-><\/span>ErrorInfo<\/span>);
} else {
<\/span>array_multisort<\/span>(<\/span>$mxweights<\/span>, <\/span>$mxhosts<\/span>);
}
<\/span>\/**
* Add A-record as last chance (e.g. if no MX record is there).
* Thanks Nicht Lieb.
* @link http:\/\/www.faqs.org\/rfcs\/rfc2821.html RFC 2821 - Simple Mail Transfer Protocol
*\/
<\/span>if (empty(<\/span>$mxhosts<\/span>)) {
<\/span>$mxhosts<\/span>[] = <\/span>$hostname<\/span>;
}
return <\/span>$mxhosts<\/span>;
}
<\/span>\/**
* Parses input string to array(0=>user, 1=>domain)
* @param string $email
* @param boolean $only_domain
* @return string|array
* @access private
*\/
<\/span>public static function <\/span>parse_email<\/span>(<\/span>