Why Aren\'t My Short PHP Tags (``) Working After Upgrading to PHP 5.3.1?

Why Aren't My PHP Short Tags Working?

Recently, after installing PHP 5.3.1 on a Linux server, users may encounter issues with legacy code that utilizes '' tags. This article addresses the problem and provides guidance on how to resolve it.

Background:

PHP 5.3.1 introduces discouraged use of short open tags (''), favoring the full-length tags (''). This shift aligns with best practices for portable application development. While short tags may still be compatible on some servers, their use can lead to unexpected behavior in various environments.

Resolution:

1. Abandon Short Tags: Transition code to use full-length tags ('') to ensure compatibility and adherence to recommended PHP practices.
2. Disable Functionally: Disable short tags by setting the 'short_open_tag' ini directive to 'Off' in php.ini.

3. Temporary Enablement: If absolutely necessary, enable short tags using one of the following methods:

   • Set 'short_open_tag = On' in php.ini
   • Use 'ini_set("short_open_tag", 1);' in code
   • Add 'php_value short_open_tag 1' to the .htaccess file

Deprecated Status:

The use of short open tags is strongly discouraged in PHP environments and will eventually be phased out. Developers are advised to transition code away from their usage.

Conclusion:

PHP 5.3.1 discourages the use of short open tags to maintain application portability and adherence to best practices. Users who encounter issues with '' tags should consider transitioning to full-length tags or exploring the temporary enablement options provided.

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