Adding Multisite breaks WP

  • I suddenly have a new problem when installing multisite on shared hosts (networksolutions & mediatemple). I have multiple blogs with multisite (running with subolders not sub-domains) but suddenly whenever I add define(‘WP_ALLOW_MULTISITE’, true); to wp-config.php, on fresh WP installs the site breaks.

    Initially I get two error lines at the top of the control panel page that says “Warning: Cannot modify header information – headers already sent by~~”. If I browse the site, the same message occurs but indicating various files and lines where the problem is originating. If I add the .htaccess and network settings to wp-config as I’ve done dozens of time before with no trouble, the site completely breaks.

    Since this happened simultaneously on two different hosts and nothing has changed but the WP release, I’m thinking it must be a WP bug. Both hosts declare it is not a server problem and they want me to edit all of the dozens of WP files that are throwing errors but that just isn’t possible, nor do I believe would it solve the problem. If anyone else has run into this, or can point me in the right direction, I would appreciate it.

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  • Moderator Ipstenu (Mika Epstein)

    (@ipstenu)

    ?????? Advisor and Activist

    What’s the full error?

    Sounds like you’re putting the define in a bad place.

    Thread Starter blogsterfiles

    (@blogsterfiles)

    Thank you @mika …I have to run out at the moment and will have to re-create it when I return, but the error message starts the same and references various php pages and line. Searching the specific errors, all the forums indicate the errors are because of blank lines at the end of the file or \<?php\ was not closed i.e. \?>\ … WordPress no longer uses the close tag on many pages and the blank trailing lines have never been a problem before.

    The define is going above the line /* That’s all, stop editing! Happy blogging. */, as I have always placed it. Bear in mind, I’ve done this dozens of times over the past few years and nothing has changed in the method used. I’ve literally spent hours on the phone with multiple people sending me links to their’s and WP codex instructions walking through it. Each time they have concluded it is a WP issue, not the install or their servers.

    Thanks very much, will follow up with the error messages when I return.

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