Wordpress导出超出内存限制

Question

While trying to export a very large wordpress site, I keep running into an out of memory error from php.

I've changed my memory limit in php.ini to

memory_limit = -1

but I'm still getting this error from wordpress' exporter in my apache error log

HP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 71 bytes) in /home/webapps/enterprise-web-root/wp-includes/formatting.php on line 2474, referer: http://XX.XXX.XXX.XXX/wp-admin/export.php

Answer 1

Wordpress has it's own default value for the maximum memory usage and it sets it admin.php with an ini_set call.

See here Wordpress 3.5.2 /wp-admin/admin.php:109

@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', WP_MAX_MEMORY_LIMIT ) );

To fix the problem, you'll need to adjust the value. I set mine to an arbitrarily high number to quickly get the export

@ini_set( 'memory_limit', apply_filters( 'admin_memory_limit', '4096M' ) );

A value of "-1" should make that memory limit uncapped completely.