Ping site and return result in PHP

Question

I d like to create a small IF procedure that will check if Twitter is available  unlike now  for example   and will return true or false   Help

User · Answer

Another option  if you need want to ping instead of send an HTTP request  is the Ping class for PHP  I wrote it for just this purpose  and it lets you use one of three supported methods to ping a server  some servers environments only support one of the three methods    Example usage   require once  Ping Ping php     host    www example com    ping   new Ping  host    latency    ping- gt ping    if   latency      print  Latency is      latency     ms     else     print  Host could not be reached

User · Answer

Here s one   http   www planet-source-code com vb scripts ShowCode asp lngWId 8 amp txtCodeId 1786  Another   function ping  host   port   timeout        tB   microtime true       fP   fSockOpen  host   port   errno   errstr   timeout      if    fP    return  down         tA   microtime true      return round    tA -  tB    1000   0    ms         Echoing it will display the ping if the host is up  if not it ll say  down   echo ping  www google com   80  10

User · Answer

Using shell exec    lt  php  output   shell exec  ping -c1 google com    echo   lt pre gt  output lt  pre gt      gt

User · Answer

function urlExists  url NULL            if  url    NULL  return false         ch   curl init  url         curl setopt  ch  CURLOPT TIMEOUT  5         curl setopt  ch  CURLOPT CONNECTTIMEOUT  5         curl setopt  ch  CURLOPT RETURNTRANSFER  true          data   curl exec  ch          httpcode   curl getinfo  ch  CURLINFO HTTP CODE         curl close  ch         if  httpcode gt  200  amp  amp   httpcode lt 300             return true          else             return false                  This was grabbed from this post on how to check if a URL exists  Because Twitter should provide an error message above 300 when it is in maintenance  or a 404  this should work perfectly

User · Answer

ping is available on almost every OS  So you could make a system call and fetch the result

User · Answer

With the following function you are just sending the pure ICMP packets using socket create  I got the following code from a user note there  N B  You must run the following as root   Although you can t put this in a standard web page you can run it as a cron job and populate a database with the results    So it s best suited if you need to monitor a site   function twitterIsUp         return ping  twitter com       function ping   host   timeout   1           ICMP ping packet with a pre-calculated checksum         package     x08 x00 x7d x4b x00 x00 x00 x00PingHost        socket   socket create AF INET  SOCK RAW  1       socket set option  socket  SOL SOCKET  SO RCVTIMEO  array  sec    gt   timeout   usec    gt  0        socket connect  socket   host  null         ts   microtime true       socket send  socket   package  strLen  package   0       if  socket read  socket  255                  result   microtime true  -  ts        else            result   false            socket close  socket        return  result

User · Answer

this is php code I used  reply is usually like this        2 packets transmitted  2 received  0  packet loss  time 1089ms   So I used code like this            ping how many   2       ping result   shell exec  ping -c    ping how many   bing com        if   preg match      ping how many   received    ping result            echo  Bad ping result   PHP EOL             goto next1

[php] Ping site and return result in PHP

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