{"id":2186,"date":"2010-11-12T12:02:21","date_gmt":"2010-11-12T12:02:21","guid":{"rendered":"http:\/\/www.markwilson.co.uk\/blog\/?p=2186"},"modified":"2010-11-19T13:10:00","modified_gmt":"2010-11-19T13:10:00","slug":"wordpress-theme-update-prevents-access-to-administrative-pages","status":"publish","type":"post","link":"https:\/\/www.markwilson.co.uk\/blog\/2010\/11\/wordpress-theme-update-prevents-access-to-administrative-pages.htm","title":{"rendered":"WordPress theme update prevents access to administrative pages"},"content":{"rendered":"<p>For days now, I&#8217;ve been banging my head against the wall on a problem with a WordPress website (not this one).  I used an agency to develop a theme for me, but every time I applied it to the site, I lost access to the \/wp-admin pages (in most browsers I saw a blank page, except in Firefox, where I could see the following characters: \u00c3\u00af\u00c2\u00bb\u00c2\u00bf).  I only have access to the WordPress application (no database administration, or access to the web server itself), so the only way out was to ask the server administrators to restore the WordPress folders from backup, which takes time and gets embarrassing after a second attempt.<\/p>\n<p>I&#8217;d seen <a href=\"http:\/\/alteredadvice.com\/wordpress-wp-admin-blank-page-fix\/\">John MacMenamin&#8217;s WordPress WP-Admin blank page fix post<\/a> and thought I&#8217;d removed all whitespace from the top\/bottom of functions.php but, after <a href=\"http:\/\/www.alexcoles.com\/\">Alex Coles<\/a> suggested that I look at <a href=\"http:\/\/en.wikipedia.org\/wiki\/Newline\">the differences between Unix-style linefeeds and Windows carriage-return\/linefeeds<\/a>, <img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.markwilson.co.uk\/blog\/images\/blank-wpadmin-culprit.png?w=700&#038;ssl=1\" alt=\"Could this be the culprit in the case of the blank \/wp-admin pages?\" \/>I spotted the same strange characters at the head of the file (they showed up in <code>windiff.exe<\/code> as I was performing a file comparison).  I don&#8217;t know how it got there but, each time I get a theme update, I have to manually remove what appeared to be a single byte from the head of the file using the <code>nano<\/code> editor on my Mac, which presented it as white space (I&#8217;m sure <code>vi<\/code> would do the job too), because not all text editors can see the offending character (certainly not Notepad on Windows, or TextEdit on a Mac).<\/p>\n<p>This cost me a lot of time (and probably delayed the launch of the website too), so I thought it might be useful to flag up for others to benefit from my experience.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For days now, I&#8217;ve been banging my head against the wall on a problem with a WordPress website (not this one). I used an agency to develop a theme for me, but every time I applied it to the site, I lost access to the \/wp-admin pages (in most browsers I saw a blank page, &hellip; <a href=\"https:\/\/www.markwilson.co.uk\/blog\/2010\/11\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">WordPress theme update prevents access to administrative pages<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[15],"class_list":["post-2186","post","type-post","status-publish","format-standard","hentry","tag-wordpress"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>WordPress theme update prevents access to administrative pages - markwilson.it<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.markwilson.co.uk\/blog\/2010\/11\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"WordPress theme update prevents access to administrative pages - markwilson.it\" \/>\n<meta property=\"og:description\" content=\"For days now, I&#8217;ve been banging my head against the wall on a problem with a WordPress website (not this one). I used an agency to develop a theme for me, but every time I applied it to the site, I lost access to the \/wp-admin pages (in most browsers I saw a blank page, &hellip; Continue reading WordPress theme update prevents access to administrative pages\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.markwilson.co.uk\/blog\/2010\/11\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\" \/>\n<meta property=\"og:site_name\" content=\"markwilson.it\" \/>\n<meta property=\"article:published_time\" content=\"2010-11-12T12:02:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2010-11-19T13:10:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.markwilson.co.uk\/blog\/images\/blank-wpadmin-culprit.png\" \/>\n<meta name=\"author\" content=\"Mark Wilson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@markwilsonit\" \/>\n<meta name=\"twitter:site\" content=\"@markwilsonit\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mark Wilson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\"},\"author\":{\"name\":\"Mark Wilson\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"headline\":\"WordPress theme update prevents access to administrative pages\",\"datePublished\":\"2010-11-12T12:02:21+00:00\",\"dateModified\":\"2010-11-19T13:10:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\"},\"wordCount\":294,\"commentCount\":2,\"publisher\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/#\\\/schema\\\/person\\\/98f61365e7c39d6be942174b8c4de468\"},\"image\":{\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/images\\\/blank-wpadmin-culprit.png\",\"keywords\":[\"WordPress\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\",\"url\":\"https:\\\/\\\/www.markwilson.co.uk\\\/blog\\\/2010\\\/11\\\/wordpress-theme-update-prevents-access-to-administrative-pages.htm\",\"name\":\"WordPress theme update prevents access to administrative pages - 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I mentioned Server Core in a previous post but here's some more on the subject, based on Scotty's presentation (it's also worth checking out Micheal Pietroforte's post on Server Core essentials).\u2026","rel":"","context":"In \"Microsoft Windows Server 2008\"","block_context":{"text":"Microsoft Windows Server 2008","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/windows-server-2008"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":362,"url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/05\/exchange-server-55-2003-migration.htm","url_meta":{"origin":2186,"position":1},"title":"Exchange Server 5.5-2003 migration gotchas","author":"Mark Wilson","date":"Tuesday 9 May 2006","format":false,"excerpt":"I've not been doing as much work with Exchange Server as I'd like in recent years; so when a friend asked me to help out with carry out an Exchange Server 5.5 to 2003 migration for one of his contacts I was happy to get involved (although I was slightly\u2026","rel":"","context":"In \"Microsoft Exchange\"","block_context":{"text":"Microsoft Exchange","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/exchange"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":623,"url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/08\/delegation-of-active-directory.htm","url_meta":{"origin":2186,"position":2},"title":"Delegation of Active Directory administration (using Quest ActiveRoles Server)","author":"Mark Wilson","date":"Thursday 10 August 2006","format":false,"excerpt":"Recently, I've been working with a client who has an extraordinarily high number of users with domain administrator rights (i.e. those who are members of the Domain Admins group). The problem is historic and they are in the process of moving from Windows NT to Active Directory (AD); whilst AD\u2026","rel":"","context":"In \"Microsoft Active Directory\"","block_context":{"text":"Microsoft Active Directory","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/active-directory"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":124,"url":"https:\/\/www.markwilson.co.uk\/blog\/2005\/05\/how-to-migrate-users-between-active.htm","url_meta":{"origin":2186,"position":3},"title":"How to migrate users between Active Directory forests using ADMT when the source and target domain names are similar","author":"Mark Wilson","date":"Tuesday 31 May 2005","format":false,"excerpt":"One of my clients is undertaking a domain consolidation process, moving to a new Active Directory (AD) forest called companyname.com with two child domains - emea.companyname.com and americas.companyname.com. All of the user accounts from the various NT 4.0 and Windows 2000 domains around the organisation are being migrated into this\u2026","rel":"","context":"In \"Microsoft Active Directory\"","block_context":{"text":"Microsoft Active Directory","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/active-directory"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":386,"url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/05\/problems-accessing-virtual-server.htm","url_meta":{"origin":2186,"position":4},"title":"Problems accessing the Virtual Server administration website on a Windows Server 2003 domain controller","author":"Mark Wilson","date":"Thursday 4 May 2006","format":false,"excerpt":"Although I have several computers at home, most of my server roles are running on a single PC. That means Active Directory (AD) domain controller (DC), DNS, DHCP, RIS, WSUS, and print services are all on one box (file services are on my NSLU2) so I figured that adding Virtual\u2026","rel":"","context":"In \"Microsoft Active Directory\"","block_context":{"text":"Microsoft Active Directory","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/active-directory"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":635,"url":"https:\/\/www.markwilson.co.uk\/blog\/2006\/12\/using-ris-as-tftp-server.htm","url_meta":{"origin":2186,"position":5},"title":"Using RIS as a TFTP server","author":"Mark Wilson","date":"Sunday 3 December 2006","format":false,"excerpt":"Earlier tonight I needed to upgrade the software on an Ethernet switch. Most network administrators will be aware that this generally requires access to a trivial file transfer protocol (TFTP) server and it's widely believed that to set up TFTP on a Windows server requires third party software. Not so\u2026","rel":"","context":"In \"Microsoft Windows Server 2003\"","block_context":{"text":"Microsoft Windows Server 2003","link":"https:\/\/www.markwilson.co.uk\/blog\/tag\/windows-server-2003"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=2186"}],"version-history":[{"count":6,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2186\/revisions"}],"predecessor-version":[{"id":2188,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/posts\/2186\/revisions\/2188"}],"wp:attachment":[{"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=2186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=2186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.markwilson.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=2186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}