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PHP4 Pages do not work with PHP5

Posted on 2006-07-08
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Last Modified: 2010-04-22
Hi,

I have just migrated a website written with PHP 4.1.2 and MySQL 3.23.56 with RH 7.3 to a new platform that consists of Fedora Core 4, PHP 5.0.4 and MySQL 4.1.20. My website shows OK except for all the operations that involve database. I've heard that there is a compatibility issue between PHP 4 and 5. Which is the quickest solution to the problem (preferably without changing the code) ?

Thank you
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Question by:agubaira
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Expert Comment

by:fridom
ID: 17067099
removing PHP5 or installing a PHP4 side by side to you PHP5. Or checking the proper database libraries.

Regards
Friedrich
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Author Comment

by:agubaira
ID: 17068178
Friedrich,

Thanks for your reply. How do I install PHP4 parallel to PHP5 and still have both functionalities ? What do you mean by checking database libraries ? I am sorry but I am new with PHP and MySQL.

Regards.
Antonio
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Accepted Solution

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fridom earned 500 total points
ID: 17070795
http://www.howtoforge.com/apache2_with_php5_and_php4

Shows an example

And checking the db library means exactly that. See how you can connect with PHP4 and then try to get connection with PHP5 maybe the proper librarry for 5 is not yet installed.

You can write cli-tools with PHP4 and PHP5 and so you can test the database connection also.

with something along the following lines:

#!/usr/local/bin/php4
  <?php
      $connection = @ mysql_connect("localhost", "user", "password");
      if (! $connection) {
        echo "Connected";
      } else {
        echo "No connection\n";
        mysql_close($connection);
      }
      ?>

Now you can try the php4 one time and php5 the other time.

If you do not have the knowledge doing that yourself it may be the right time to look for
some unix guy nearby ;)

Regards
Friedrich

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