Replacing Text

[adam84]

I have a textfield where the user enters a keyword about whatever they are looking for. I send the data to my php file to be processed and what I want to do is highlight the keyword that the user entered in, when I display the all the results that have matched the keyword.

What I did was use the str_replace() function, but what I have noticed is the function is case sensitive. So if the user enters 'beer'. Only the word 'beer' will get highlighted, but 'Beer', 'beeR' or 'BEER'. What would I need to do, to make it work on every instance of the word.

[Jessica]

You could read the manual:

http://us2.php.net/str_replace

Read the Notes:

Notes

 

    Note: This function is binary-safe.

    Note: This function is case-sensitive. Use **GO FIND OUT** for case-insensitive replace.

 

At the bottom of most function's entries is a list of related functions.

[adam84]

awesome, the only thing is that i have version 4.44 and this is version 5. Any other way..?

[nathanmaxsonadil]

Dreamhost hasn't upgraded to PHP 5.0 -- I came up with my own alternative, trying to make it run as much like str_ireplace() as possible.  Adjust the switch-a-roo token if you think it may conflict with your needle in teh haystack.

 

## HOMEBREW str_ireplace() FOR PRE-PHP 5.0

if (!function_exists('str_ireplace')  {

  function str_ireplace($search,$replace,$subject) {

    $token = '^[[term^]';

    $haystack = strtolower($subject);

    $needle = strtolower($search);

    while (($pos=strpos($haystack,$needle))!==FALSE)  {

      $c++;

      $subject = substr_replace($subject,$token,$pos,strlen($search));

      $haystack = substr_replace($haystack,$token,$pos,strlen($search));

    }

    while (($pos=strpos($subject,$token))!==FALSE)  {

      $subject = substr_replace($subject,$replace,$pos,strlen($token));

    }

    return $subject;

  }

}

[lemmin]

ereg_ireplace works in PHP 4.

http://us.php.net/manual/en/function.eregi-replace.php

[effigy]

This, perhaps?