Title: Minimum PHP requirements (PHP 4.2)?
Last modified: August 18, 2016

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# Minimum PHP requirements (PHP 4.2)?

 *  [nicokaiser](https://wordpress.org/support/users/nicokaiser/)
 * (@nicokaiser)
 * [21 years, 5 months ago](https://wordpress.org/support/topic/minimum-php-requirements-php-42/)
 * What are the miminum requirements for WordPress? The website says it’s PHP 4.1,
   but in class-IXR.php there are “in_a()” calls and “ob_clean()”, these are only
   available in PHP >= 4.2…
    Maybe the inclusion of the PEAR PHP_Compat package 
   would be a good idea?

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Moderator [Matt Mullenweg](https://wordpress.org/support/users/matt/)
 * (@matt)
 * [21 years, 5 months ago](https://wordpress.org/support/topic/minimum-php-requirements-php-42/#post-99700)
 * What version are you running?
 *  Thread Starter [nicokaiser](https://wordpress.org/support/users/nicokaiser/)
 * (@nicokaiser)
 * [21 years, 5 months ago](https://wordpress.org/support/topic/minimum-php-requirements-php-42/#post-99704)
 * Oh I see. I’m running WP 1.3-alpha-4. The class-IXR seems not to be in WordPress
   1.2, so WP 1.3 needs PHP 4.2?
 *  Thread Starter [nicokaiser](https://wordpress.org/support/users/nicokaiser/)
 * (@nicokaiser)
 * [21 years, 5 months ago](https://wordpress.org/support/topic/minimum-php-requirements-php-42/#post-99708)
 * I just upgraded to the latest CVS snapshot, it works now. Compatibility functions
   seem to be added now 🙂 Thanks!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Minimum PHP requirements (PHP 4.2)?’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 3 replies
 * 2 participants
 * Last reply from: [nicokaiser](https://wordpress.org/support/users/nicokaiser/)
 * Last activity: [21 years, 5 months ago](https://wordpress.org/support/topic/minimum-php-requirements-php-42/#post-99708)
 * Status: not resolved

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