I need to know when should i use wp_redirect()?

Question

I am using wp_redirect() to redirect to a URL but it gives me the warning below and does not redirect. When should I use wp_redirect()? And does any one know how wp_redirect() works?

**[Fri Feb 28 03:58:36 2014] [error] [client 127.0.0.1] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/virgo/public_html/others/sites/wepay/wp-content/ themes/twentythirteen/header.php:43) in /home/virgo/public_html/o thers/sites/wepay/wp-includes/pluggable.php on line 875, referer: http://127.0.0.1/others/sites/wepay/?page_id=15**

You can't use it after anything has been output, since it sends a redirect by using a Location header, and the headers come before the body of an HTTP message. — Paul
– Paul, Commented Feb 27, 2014 at 23:37
See stackoverflow.com/q/7381661/2126792 or stackoverflow.com/a/12770075/2126792. — pschueller
– pschueller, Commented Feb 27, 2014 at 23:45

Nathan Dawson · Accepted Answer · 2014-02-28 00:25:07Z

Headers need to come first therefore you have to place this before any output. This includes error messages. If you run some code that has an issue which generates a notice this will prevent the redirect from running.

Take a look here: http://codex.wordpress.org/Plugin_API/Action_Reference

get_header is the latest point.

I'd suggest doing it once WP has been setup so you can use all conditionals including use of $post but still early. The most appropriate hook in my opinion would be 'wp'.

function wpse_redirect() { if ( ENTER A CONDITIONAL ) { wp_redirect( 'redirect-location' ); exit; } } add_action( 'wp', 'wpse_redirect' );

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