$conf, $runtime; function_exists('chdir') AND chdir(APP_PATH); $r = 'mysql' == $conf['cache']['type'] ? website_set('runtime', $runtime) : cache_set('runtime', $runtime); } function runtime_truncate() { global $conf; 'mysql' == $conf['cache']['type'] ? website_set('runtime', '') : cache_delete('runtime'); } register_shutdown_function('runtime_save'); ?>hooks - PHP header() gives headers already sent|Programmer puzzle solving

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    hooks - PHP header() gives headers already sent

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    I am working on a checkout proces in Wordpress where if customer clicks on the checkout button he gets redirected to a payment provider.

    Important to know:

    • I use a session in this proces.
    • I use PHP header() function to sent the customer to this location.

    My problem: Now when you click the button, there is no redirect, but an error instead.

    Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/website/httpdocs/wp-content/themes/template/header.php:24) in /var/www/vhosts/website/httpdocs/wp-content/themes/template/page-checkout.php on line 84

    Line 84 is:

    header( "Location: " . $payment->getPaymentUrl() );

    So it looks like I need to do the redirect earlier, but I don't know how to do it. Has anyone any idea? Hook the init or send_headers action?

    I have one solution at the moment which solves the problem, but I know that it is not the right one. The solution is placing ob_start() in the top of my header.php

    I am working on a checkout proces in Wordpress where if customer clicks on the checkout button he gets redirected to a payment provider.

    Important to know:

    • I use a session in this proces.
    • I use PHP header() function to sent the customer to this location.

    My problem: Now when you click the button, there is no redirect, but an error instead.

    Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/website/httpdocs/wp-content/themes/template/header.php:24) in /var/www/vhosts/website/httpdocs/wp-content/themes/template/page-checkout.php on line 84

    Line 84 is:

    header( "Location: " . $payment->getPaymentUrl() );

    So it looks like I need to do the redirect earlier, but I don't know how to do it. Has anyone any idea? Hook the init or send_headers action?

    I have one solution at the moment which solves the problem, but I know that it is not the right one. The solution is placing ob_start() in the top of my header.php

    • hooks
    • headers
    • session
    • init
    Share Improve this question edited May 20, 2014 at 14:51 Pieter Goosen 55.5k23 gold badges117 silver badges211 bronze badges asked May 20, 2014 at 14:45 RobbertRobbert 1,2756 gold badges23 silver badges47 bronze badges 1
    • Where is your code? Please post it in context. – s_ha_dum Commented May 20, 2014 at 15:10
    Add a comment  | 

    1 Answer 1

    Reset to default 0

    I had to do it with WordPress's inbuilt redirect function; wp_redirect();

    wp_redirect( $payment->getPaymentUrl() );
exit;

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