How to check if a file exists from a url

Question

I need to check if a particular file exists on a remote server  Using is file   and file exists   doesn t work  Any ideas how to do this quickly and easily

User · Answer

Do a request with curl and see if it returns a 404 status code  Do the request using the HEAD request method so it only returns the headers without a body

User · Answer

I ve just found this solution   if  getimagesize  remoteImageURL          image exists   else        image does not exist      Source  http   www dreamincode net forums topic 11197-checking-if-file-exists-on-remote-server

User · Answer

You don t need CURL for that    Too much overhead for just wanting to check if a file exists or not      Use PHP s get header     headers get headers  url     Then check if  result 0  contains 200 OK  which means the file is there   A function to check if a URL works could be this   function UR exists  url       headers get headers  url      return stripos  headers 0   200 OK   true false        You can test a URL like this  sample     if UR exists  http   www amazingjokes com        echo  This page exists   else    echo  This page does not exist

User · Answer

You have to use CURL  function does url exists  url         ch   curl init  url       curl setopt  ch  CURLOPT NOBODY  true       curl exec  ch        code   curl getinfo  ch  CURLINFO HTTP CODE        if   code    200             status   true        else            status   false            curl close  ch       return  status

User · Answer

You can use the function file get contents     if file get contents  https   example com example txt            File exists

User · Answer

headers   get headers  isset   SERVER  HTTPS     amp  amp    SERVER  HTTPS        on     https     http               SERVER HTTP HOST      uploads      MAIN  id       pdf         fileExist    stripos  headers 0    200 OK     true   false       if   fileExist          gt       lt a class  button  href   uploads  lt     MAIN  id     gt  pdf  download gt         lt  a gt        lt           gt

User · Answer

Hi according to our test between 2 different servers the results are as follows   using curl for checking 10  png files  each about 5 mb  was on average 5 7 secs  using header check for the same thing took average of 7 8 seconds   So in our test curl was much faster if you have to check larger files   our curl function is   function remote file exists  url        ch   curl init  url       curl setopt  ch  CURLOPT NOBODY  true       curl exec  ch        httpCode   curl getinfo  ch  CURLINFO HTTP CODE       curl close  ch       if   httpCode    200   return true       return false      here is our header check sample   function UR exists  url       headers get headers  url      return stripos  headers 0   200 OK   true false

[php] How to check if a file exists from a url

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