Website Input Form Question

[JJBlaha]

I want to have a user input their website, and if they do not put http:// before it, i want the script to add it.  If they did put it, then i want it unchanged.  For example an input of www.phpfreaks.com should output as http://www.phpfreaks.com.  Anyone know how to do this?

[matto]

combination of if, substr(), and substr_replace() should do the trick

[JJBlaha]

could you give me an example of how that might look? i have never used substr or strstr before.

[chiprivers]

<?php

if(substr($string,0,7) = "http://") {
  // leave $string as is
} else {
  $string = "http://".$string;
}

?>