Error 500 Premature end of script headers

Question

I get a  Premature end of script headers  contactform cgi  error message when running the below script   What frustrates me is that I ran this as a  php on another server and it worked   However  I had to change servers and they only support CGI PHP   However  it doesn t work   I don t think the code is wrong  but take a look just in case   I ve read around and some have said it s a permissions issue   Could this be the case for me   I know that the  display errors  and  error reporting  statements will display errors in the error log  but if I don t have access to the server  how can I check the logs      usr local bin php   lt  php  print  Content-type  text html n n   use CGI  Carp qw fatalsToBrowser   ini set  display errors  1   error reporting E ALL    if isset   POST  email          Email this form to me  email to    myemail site com    function died  error           your error code can go here     echo  Oops    something s wrong         echo  Fix the error s  below  lt br   gt  lt br   gt        echo  error   lt br   gt  lt br   gt        die           validation expected data exists if  isset   POST  first name            isset   POST  last name            isset   POST  email            isset   POST  subject            isset   POST  comments           died  There appears to be a problem with the form you submitted                 first name     POST  first name       required  last name     POST  last name       required  email from     POST  email       required  subject     POST  subject       not required  comments     POST  comments       required   error message        email exp       A-Za-z0-9   -    A-Za-z0-9 -     A-Za-z  2 4      if  preg match  email exp  email from      error message     The Email Address you entered does not appear to be valid  lt br   gt       string exp       A-Za-z   -       if  preg match  string exp  first name      error message     The First Name you entered does not appear to be valid  lt br   gt      if  preg match  string exp  last name      error message     The Last Name you entered does not appear to be valid  lt br   gt      if strlen  comments   lt  2     error message     The Comments you entered do not appear to be valid  lt br   gt      if strlen  error message   gt  0    died  error message        email message    Form details below  n n    function clean string  string       bad   array  content-type   bcc    to    cc    href      return str replace  bad     string       email message     First Name    clean string  first name    n    email message     Last Name    clean string  last name    n    email message     Email    clean string  email from    n    email message     Subject    clean string  subject    n    email message     Comments    clean string  comments    n      Email Subject  put here to include subject from form   email subject    SUBJECT     clean string  subject           create email headers  headers    From     email from   r n    Reply-To     email from   r n     X-Mailer  PHP     phpversion     mail  email to   email subject   email message   headers     gt    lt  -- include your own success html here -- gt    lt  php header  Location  thankyou html        gt

User · Answer

I have this issue and resolve this by changing PHP version from 5 3 3 to 5 6 30

User · Answer

In my case  referencing a PHP file in the top folder of a Wordpress plugin  I had to change the permissions on that folder  My test environment was fine  but when deployed the folder had 775  I changed it to 755 and it works fine

User · Answer

Check your line endings   If you see an error about the file not being found  followed by this  premature of end headers  error in your Apache log - it may be that you have Windows line endings in your script in instead of Unix style   I ran into that problem   solution

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I bumped into this problem using PHP-FPM and Apache after increasing Apache s default LimitRequestFieldSize and LimitRequestLine values     The only reason I did this  apache says don t mess  is because Yii2 has some pjax problems with POST requests  As a workaround  I decided to increase these limits and use gigantic GET headers    php-fpm barfed up the 500 error though

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to fix this  I had to change permissions for whole directory to 755  777 did not work for me   and changed file owners for whole directory  chmod -R 755 public html chown -R nobody nobody public html   nobody is user that runs php in my computer

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The  Premature end of script headers  error message is probably the most loathed and common error message you ll find  What the error actually means  is that the script stopped for whatever reason before it returned any output to the web server  A common cause of this for script writers is to fail to set a content type before printing output code  In Perl for example  before printing any HTML it is necessary to tell the Perl script to set the content type to text html  this is done by sending a header  like so   print  Content-type  text html n n      source  http   htmlfixit com cgi-tutes tutorial Common Web dev error messages and what they mean php premature

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I tried all of the above but found out it was a missing windows compiler   Downloading and installing this fixed the issue  To see if this is your problem  try to run PHP from command line   msvcr110 dll is missing from computer error while installing PHP

User · Answer

It is to do with file permissions and it happens on systems that have the suphp usually cpanel whost servers  installed    Removing the write permission from anyone else but the owner 644 600  for the php files will fix the issue  That is how i got it fixed   I hope this helps

User · Answer

After many diff s  this was what was missing from the httpd conf file on the server in question   AddHandler php5-script  php   Solved the issue

User · Answer

Error can be caused by various issues  for more info check suexec or fcgi logs  For example if suexec has wrong user and permssion it can cause the error to occur to solve try  chgrp WEBGROUP  usr local apache2 bin suexec chmod 4750  usr local apache2 bin suexec

User · Answer

It was a file permission issue  All files on my website were set to a permission level of  644    Once I changed the permission level to 705  chmod 705  everything worked  Note that I changed it to 705  but 755 will also work  I also changed the folder it was in to 701  to hide it  but still be executable by the server   Aside  I still don t understand why my  PHP file worked on the other server when it was probably set to 644    How could Apache execute the script without world permission    Does Apache not need world permission    Just a few questions I still have

User · Answer

In my case it was a cache directory that wasn t so big  only 17MB but duo to the file structure it took forever to be accessed by the website and was producing that error after max execution time was reached   I renamed the directory to cache-BK and created a new cache directory with the same permissions and that solved the problem

User · Answer

u forgot to add proper content-type header in the response which is a must have http header when hosting on apache2  use   print  Content-type text html r n r n    or  header  Content-Type  text html

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I experienced this problem today  but unfortunately none of the suggestions here helped  The only problem was that I didn t see ANY errors   I literally had to do an strace -p  lt process id gt  on the Apache thread to spot the headers being written and Apache crashing on the next line  Somewhere in my PHP code I was setting a header with over 12KB of data   The lesson here is that in some cases  Apache crashing with a HTTP error 500 - Premature end of script-failure can be the result of having too long or overflowing HTTP headers   Debug your headers for length if you have this same problems because most  if not all  web servers have HTTP header limits   PS  This reply has some info on header sizes

User · Answer

In my case I had to change     usr bin php   to     usr bin php-cgi

[php] Error 500: Premature end of script headers

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