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Deprecated: Function eregi()

Posted on 2014-03-20
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282 Views
Last Modified: 2014-03-20
Hi Guys,
What do I have to do to my code (below) to update it?
Thanks,
Sas
     if (!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$", $eMail))
   {
      print "
      <FONT face='Arial'  size='4' color=RED><B>BAD E-MAIL ADDRESS!</B>
      </FONT><FONT face='Arial'  size='2' color=BLACK> <P>
      That's not a valid email address format. 
      <P>Use the '<B><BLINK>GO BACK</BLINK></B>' button and correct it.<BR>
<P>	
<input name='BACK' type='button'   class='button NxtGENERIC' value='GO BACK' onclick='history.back();' style='width: 250px; height:26px;  FONT-SIZE:12px; font-family:Arial;'>
</p>
";
   }

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Question by:sasnaktiv
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9 Comments
 
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Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 39942787
Use preg_match instead. You'll need to tweak the pattern just a bit though:

if (!preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/i", $eMail))

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The / ... /  are pattern delimiters. They don't have to be /, but that's typically what is used. Also, the trailing lowercase I at the end turns on case-insensitivity.
0
 
LVL 108

Expert Comment

by:Ray Paseur
ID: 39942958
Sas: Throw it away and use filter_var() instead.  
http://php.net/manual/en/function.filter-var.php
http://php.net/manual/en/filter.filters.validate.php ( see FILTER_VALIDATE_EMAIL)

Here is an old code snippet that works for me.

<?php // demo/email_validation_old.php
error_reporting(E_ALL);


// A FUNCTION TO TEST FOR A VALID EMAIL ADDRESS, RETURN TRUE OR FALSE
// SEE MAN PAGE: http://php.net/manual/en/intro.filter.php
function check_valid_email($email, $rout=TRUE)
{
    // LIST OF BLOCKED DOMAINS
    $bogus = array
    ( '@unknown.com'
    , '@example.com'
    , '@gooseball.org'
    )
    ;

    // IF PHP 5.2 OR ABOVE, WE CAN USE THE FILTER
    if (strnatcmp(phpversion(),'5.2') >= 0)
    {
        if(filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE) return FALSE;
    }

    // IF LOWER-LEVEL PHP, WE CAN CONSTRUCT A REGULAR EXPRESSION
    else
    {
        $regex
        = '/'                        // START REGEX DELIMITER
        . '^'                        // START STRING
        . '[A-Z0-9_-]'               // AN EMAIL - SOME CHARACTER(S)
        . '[A-Z0-9._-]*'             // AN EMAIL - SOME CHARACTER(S) PERMITS DOT
        . '@'                        // A SINGLE AT-SIGN
        . '([A-Z0-9][A-Z0-9-]*\.)+'  // A DOMAIN NAME PERMITS DOT, ENDS DOT
        . '[A-Z\.]'                  // A TOP-LEVEL DOMAIN PERMITS DOT
        . '{2,6}'                    // TLD LENGTH >= 2 AND =< 6
        . '$'                        // ENDOF STRING
        . '/'                        // ENDOF REGEX DELIMITER
        . 'i'                        // CASE INSENSITIVE
        ;
        // TEST THE STRING FORMAT
        if (!preg_match($regex, $email)) return FALSE;
    }

    // TEST TO SEE IF THE DOMAIN IS IN OUR BLOCKED LIST
    foreach ($bogus as $badguy)
    {
        if (stripos($email, $badguy)) return FALSE;
    }

    // FILTER_VAR OR PREG_MATCH DOES NOT TEST IF THE DOMAIN IS ROUTABLE
    if ($rout)
    {
        $domain = explode('@', $email);

        // MAN PAGE: http://php.net/manual/en/function.checkdnsrr.php
        if ( checkdnsrr($domain[1], "MX") || checkdnsrr($domain[1], "A") ) return TRUE;

        // EMAIL IS NOT ROUTABLE
        return FALSE;
    }
    return TRUE;
}



// DEMONSTRATE THE FUNCTION IN ACTION
$e = NULL;
if (!empty($_GET["e"]))
{
    $e = $_GET["e"];
    if (check_valid_email($e))
    {
        echo "<br/>VALID: $e \n";
    }
    else
    {
        echo "<br/>BOGUS: $e \n";
    }
}


// END OF PROCESSING - CREATE THE FORM USING HEREDOC NOTATION
$form = <<<ENDFORM
<form>
TEST A STRING FOR A VALID EMAIL ADDRESS:
<input name="e" value="$e" />
<input type="submit" />
</form>
ENDFORM;

echo $form;

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And since PHP 5.2 is ancient history, here is a revised version.

<?php // demo/email_validation.php
error_reporting(E_ALL);


// A FUNCTION TO TEST FOR A VALID EMAIL ADDRESS, RETURN TRUE OR FALSE
// SEE MAN PAGE: http://php.net/manual/en/intro.filter.php
function check_valid_email($email, $rout=TRUE)
{
    // LIST OF BLOCKED DOMAINS
    $bogus = array
    ( '@unknown.com'
    , '@example.com'
    , '@gooseball.org'
    )
    ;

    // IF THE EMAIL STRING IS IMPROPERLY FORMED
    if(filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE) return FALSE;

    // TEST TO SEE IF THE DOMAIN IS IN OUR BLOCKED LIST
    foreach ($bogus as $badguy)
    {
        if (stripos($email, $badguy)) return FALSE;
    }

    // FILTER_VAR DOES NOT TEST IF THE DOMAIN IS ROUTABLE
    if ($rout)
    {
        $domain = explode('@', $email);

        // MAN PAGE: http://php.net/manual/en/function.checkdnsrr.php
        if ( checkdnsrr($domain[1], "MX") || checkdnsrr($domain[1], "A") ) return TRUE;

        // EMAIL IS NOT ROUTABLE
        return FALSE;
    }
    return TRUE;
}



// DEMONSTRATE THE FUNCTION IN ACTION
$e = NULL;
if (!empty($_GET["e"]))
{
    $e = $_GET["e"];
    if (check_valid_email($e))
    {
        echo "<br/>VALID: $e \n";
    }
    else
    {
        echo "<br/>BOGUS: $e \n";
    }
}


// END OF PROCESSING - CREATE THE FORM USING HEREDOC NOTATION
$form = <<<ENDFORM
<form>
TEST A STRING FOR A VALID EMAIL ADDRESS:
<input name="e" value="$e" />
<input type="submit" />
</form>
ENDFORM;

echo $form;

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Note that this will "validate" a parked domain.  The only sure way to know if there is a human on the other end of the email link is to send a confirmation message and get a response.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_3939-Registration-and-Email-Confirmation-in-PHP.html
0
 
LVL 1

Author Comment

by:sasnaktiv
ID: 39942973
Thanks Kaufmed,
It's not giving me the deprecation errors anymore, but it's also not functioning properly. It's returning with a "BAD OFFICE E-MAIL ADDRESS!" when the entry is correct.

Any ideas on that?
Sas
0
 
LVL 1

Author Comment

by:sasnaktiv
ID: 39942982
Actually Kaufmed,
It is working properly. I just made a dumb mistake.
Sas
0
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LVL 108

Expert Comment

by:Ray Paseur
ID: 39943055
0
 
LVL 1

Author Comment

by:sasnaktiv
ID: 39943291
I've requested that this question be closed as follows:

Accepted answer: 0 points for sasnaktiv's comment #a39942982

for the following reason:

Easy
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39943256
Does that mean my answer did not help? You selected your own comment as the solution.
0
 
LVL 1

Author Closing Comment

by:sasnaktiv
ID: 39943292
Just one more mistake I've made today.
I hope this corrects the Solution Award.
Sorry about that.
And thanks for the help and attention Guys.
Sas
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39943353
No worries. I was just checking    = )
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