What causes an HTTP 405 invalid method HTTP verb error when POSTing a form to PHP on IIS

Question

I have one form in a PHP  5 2 9-1  application that causes IIS  Microsoft-IIS 6 0  to throw the following error when POSTed      The page you are looking for cannot be displayed because an invalid method  HTTP verb  was used to attempt access    It s an HTTP 405 status code  All other forms in the application work  so I believe that the IIS  verbs  setting for PHP pages is correct   This is a customer s server  which I have no access to for verifying settings or testing code  All I can do is send the customer replacement files  Other customers on IIS servers have no such issue   The form is perfectly straightforward    lt form method  post  action  index php  gt          fields       lt  form gt    What can cause IIS to throw that error on one form only  but work fine on others

User · Answer

I don t know why but its happened when you submit a form inside a page to itself by the POST method   So change the method  post  to method  get  or remove action  anyThings any  from your  lt form gt  tag

User · Answer

An additional possible cause   My HTML page had these starting tags    lt  DOCTYPE html gt   lt html xmlns  http   www w3 org 1999 xhtml  gt    This was on a page that using the slick jquery slideshow   I removed the tags and replaced with    lt html gt    And everything is working again

User · Answer

i had to change my form s POST to a GET  i was just doing a demo post to an html page  on a test azure site  read this for info    http   support microsoft com kb 942051

User · Answer

I am deploying VB6 IIS Applications to my remote dedicated server with 75 folders  The reason I was getting this error is the Default Document was not set on one of the folders  an oversight  so the URL hitting that folder did not know which page to server up  and thus threw the error mentioned in this thread

User · Answer

As drewm himself said this is due to the subsequent redirect after the POST to the script has in fact succeeded   I might have added this as a comment to his answer but you need 50 reputation to comment and I m new round here - daft rule IMHO   BUT it also applies if you re trying to redirect to a page  not just a directory - at least it did for me  I was trying to redirect to  thankyou html  What fixes this is using an absolute URL  i e  http   example com thankyou html

User · Answer

It sounds like the server is having trouble handling POST requests  get and post are verbs    I don t know  how or why someone would configure a server to ignore post requests  but the only solution would be to fix the server  or change your app to use get requests

User · Answer

I managed to get FTP access to the customer s server and so was able to track down the problem   After the form is POSTed  I authenticate the user and then redirect to the main part of the app   Util  redirect   apps content      The error was occurring not on the posting of the form  but on the redirect immediately following it  For some reason  IIS was continuing to presume the POST method for the redirect  and then objecting to the POST to  apps content as it s a directory   The error message never indicated that it was the following page that was generating the error - thanks Microsoft   The solution was to add a trailing slash   Util  redirect   apps content       IIS could then resolve the redirect to a default document as is no longer attempting to POST to a directory

User · Answer

The acceptable verbs are controlled in web config  found in the root of the website  in  lt system web gt  lt httpHandlers gt  and possibly  lt webServices gt  lt protocols gt   Web config will be accessible to you if it exists   There is also a global server config which probably won t    If you can get a look at either of these you may get a clue   The acceptable verbs can differ with the content types - have you set Content-type headers in your page at all    i e  if your Content-type was application json then different verbs would be allowed

User · Answer

By any chance have you tried POST vs post  This support article suggests it can cause problems with IIS  http   support microsoft com  id 828726

User · Answer

I had this issue with a facebook application that I was developing for a fan page tab  If anyone faces this issue with a facebook application then   1-goto https   developers facebook com   2-select the application that you are developing  3-make sure that all the link to your application has tailing slash     my issue was in the https   developers facebook com- Apps- MYAPPNAME- settings- Page Tab- Secure Page Tab URL  Page Tab Edit URL  Page Tab URL hope this will help

User · Answer

We just ran into this same issue  Our Cpanel has expanded from PHP only to PHP and  NET and defaulted to  NET   Log in to you Cpanel and make sure you don   t have the same issue

[php] What causes an HTTP 405 "invalid method (HTTP verb)" error when POSTing a form to PHP on IIS?

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