concatenation

[mishasoni]

Hello:

 

First off, I am a PHP newbie.

I have a database field called 'ExpertiseWeb' that contains web addresses. I am trying to append "http://" to any records that do not contain the http:'' prefix, but I am having no luck.  It either returns nothing, only the http://, or http://http:// followed by the field data.  The code is below.  Please help!

 

<?php if (!empty($row_rsParticipants['ExpertiseWeb'])) { // checks "ExpertiseWeb" field to see if it is empty

 

if (substr('$url',0,7) != 'http://') { // adds "http://" prefix if none exists

$url = "http://".$url;

} 

 

elseif (substr('$url',0,7) == 'http://') {

$url = $row_rsParticipants['ExpertiseWeb'];

}

   

}?>

   

             

<?php if (!empty($row_rsParticipants['ExpertiseWeb'])) { // Show if field not empty ?>

      <tr>

                <td height="17" align="left" valign="top" bordercolor="0"><strong>Website:</strong></td>

                <td align="left" valign="top" bordercolor="0">

<a href="<?php echo $url ?>"><?php echo $url ?></a>

                </td>

      </tr>

 

<?php } // Show if field not empty ?>

 

[xtopolis]

I prefer preg_match.

 

Here's some logic you can implement into your code.  Hint, replace the substr functions.

Try it, and if you have trouble post what you tried, and I will help you some more

<?php
  $ar = array('http://www.xtopolis.com','xtopolis.com','www.xtopolis.com','https://nonstop.xtopolis.com','','');

$c = count($ar);
for($i=0;$i<$c;$i++)
{
  $prefix = 'http://';
  $pattern = '/^http(s)?\:\/\//'; //Starts with http (has, or has not an 's') and also ://

  if(empty($ar[$i])){ echo 'No url given.<br >'; continue; }//empty? echo no url, skip

  if(!preg_match($pattern,$ar[$i])){ //  match? no, add prefix, yes, leave it alone
    $url = $prefix.$ar[$i];
  }else{
    $url = $ar[$i];
  }
  echo $url.'<br />';
}
/*//outputs
http://www.xtopolis.com
http://xtopolis.com
http://www.xtopolis.com
https://nonstop.xtopolis.com
No url given
No url given
*/?>

[mishasoni]

Worked great.  Thanks for the help.

[discomatt]

Your method was bang on, and is actually quite a bit faster than the regex solution provided...

 

You simply bunged up on the variables a bit

 

<?php

if (!empty($row_rsParticipants['ExpertiseWeb'])) { // checks "ExpertiseWeb" field to see if it is empty
                        
   # You had
   #  substr('$url',0,7) != 'http://'
   # This is wrong because for one, you're checking the literal string '$url' and not the variable
   # $url. You'd do this with
   #  substr($url,0,7) != 'http://'
   # But even that's wrong, cause as of right now, $url is empty 
   if (substr($row_rsParticipants['ExpertiseWeb'],0,7) != 'http://') { // adds "http://" prefix if none exists
      $url = "http://".$row_rsParticipants['ExpertiseWeb'];
   } 
   # Same story here
   elseif (substr($row_rsParticipants['ExpertiseWeb'],0,7) == 'http://') {
      $url = $row_rsParticipants['ExpertiseWeb'];
   }
               
}

?>