So I would like to be able to call the unix mail function form a PHP script. Yes, I know PHP has a built in mail function itself, but I am having issues with the PHP config on my intranet server and have been trying very hard to resolve with no such luck. I figured it would be easier to just invoke the Unix mail function (since I know it works with other scripts) from PHP instead of trying to re-configure the PHP install, which could end up messing things up for other sites. Could someone explain how to accomplish this as well as how I can set up an email template to be sent out in the email? Thanks in advance !!
Brett
Calling unix commands directly requires that your php install be allowed to execute shell commands which is dangerous and really should only be done in cases where there is not a suitable pure php wrapper. There is a suitable wrapper in php. What problems have you been having with it?
To answer your question, look at the exec() function. Unless php is configured to disallow it, that is how you call external commands from within php. I still recommend against it.
For generating and sending e-mail from a php web application, I find that the phpMailer is an excellent easy to use php class.
Try something like
system('/usr/bin/mailx -s "Your Subject" rcpt#example.org < /tmp/mailfile.txt')
Be careful if the input is accepted from the user, read these first:
http://php.net/manual/de/function.system.php
http://www.php.net/manual/en/function.escapeshellcmd.php
http://www.php.net/manual/en/function.escapeshellarg.php
All in all, it would be much safer and portable to use the mail functions available in PHP. Also, your provier may disable the system and similar functions (by using safe_mode).
Related
I have a php file that handles contacting me from my site via email. I don't know much about php but when i use node all i have to do is start up my node server file and the whole site launches. My front end is html/javascript and the only "backend" is the contact_me.php. I need to be able to have my php running so that it works with my site. I know nothing about apache. If you could tell me how to setup what i need to setup or point me in the right direction that would be awesome. I have tried reading the documentation for apache to no avail.
PHP mail manual will help you set up mail in php.
If you are new to this, its better to use some inbuilt libraries like PHPMailer which have decent enough documentation for beginners.
PHP 5.4 has the built-in server (php -S localhost:8080). I'd like to be able to "create_server" (or similar, clearly don't know the function name) from within a PHP script (and without resolving to system, system_exec, exec, or backticks), but I don't see that in the documentation. Is this possible?
Barring an actual trip through PHP's C source, the answer to this question seems to be "There is no way to accomplish this"
I'm trying to write a website in PHP that allows the user to enter PHP code, and then be able to run it on my server. However, I want to be able to disable certain features (file access, database access, etc.). Basically, I want the code to run without any risk to my server, and if the code does attempt to do something dangerous, I just want the code to stop running (I don't mind if it just stops, produces an error, or carries on while ignoring the dangerous code).
Is this possible, and if so, how could I achieve this?
Thanks :)
It is possible using libraries that do some simple checking or limiting.
Take a look at a PECL (PHP Extensions) extension called RunKit_Sandbox http://php.net/manual/en/runkit.sandbox.php or PHPSandbox.
The key to look for on Google is PHP Sandbox, it will find you similar libraries.
vi php.ini
and then find disable_functions,
disable the functions as you want! like this :
disable_functions = exec,passthru,popen,proc_open,shell_exec,system,phpinfo,assert,chroot,getcwd,scandir,delete,rmdir,rename,chgrp,chmod,chown,copy,mkdir,file,file_get_contents,fputs,fwrite,dir
I actually developed a package specifically for these kinds of use cases. It can be fully configured and even used to override dangerous functions and globals.
https://github.com/fieryprophet/php-sandbox
I'm desperately searching for a way to generate SNMP traps from PHP. I know the build in methods to use snmpget but I was not able to figure out how to send SNMP traps.
Does anybody know a class / code snippet for it? Searching the web did not bring up anything other than using exec to call cli tools which is definately no option for me.
I suspect that it would be neccessary to use socket_create and corresponding functionality to generate the UDP package manually...
As far as I know, there is no native way for generating traps/informs with php. Even the SNMP extension only permits get and set requests. So the only (quick) way to accomplish this is to call an external tool like net-snmp. The proper command line would be something like
snmptrap -v 1 -c public manager enterprises.spider test-hub 3 0 '' interfaces.iftable.ifentry.ifindex.1 i 1
will send a generic linkUp trap to manager, for interface 1 (taken from the manpage). To execute this from php the net-snmp binaries should be on the path of the system and you could either call exec, shell_exec or proc_open.
Obvisouly you also can send the trap by yourself by encoding it as raw byte array and sending it over an UDP socket, but then you had to implement a BER encoder and a SNMP packet encoder all by yourself which I don't recommend. For your reference, you would need those informations:
Basic Encoding Rules
ASN.1
and some further links found
here
There are no core SNMP trap libraries. Or even any core libraries that will help you package an SNMP udp packet. I did however find this abandoned project. http://code.google.com/p/php-snmp/ which provides most of what you would need to send a simple trap.
A little more active but a lot more complex seems to be http://www.activexperts.com/network-component/howto/snmpts/php/
For anybody searching for such a library these days (in 2019), I found https://github.com/FreeDSx/SNMP which supports sending SNMPv1 and SNMPv2 traps (including inform requests).
I know this question is old, but I just came across it via Google, and thought to update it according to my findings in case someone else also lands here.
As Jek answered, using net-snmp is the best solution.
Although the original post said that he didn't want to use any external components, consider you can now add net-snmp though apt-get (look up package php-snmp) for many Linux distro's, and I'm sure installing on Windows will be equally easy.
The great benefit of using it, is as of PHP 5.3.3, PHP inherintly has built-in interface functions to use SNMP, so that you don't have to use exec, shell_exec or proc_open. Everything can be done in a PHP environment.
See http://php.net/manual/en/book.snmp.php
My question is whether or not Flex's fcsh can be called from within a PHP script. Here is the background:
I have been created a simple process that creates a simple quiz/tutorial by converting a text file into a .mxml file and compiling to a .swf file using the mxmlc compiler. This works well from the command line, but I wanted to make the process easier by creating a web-interface to do this. My initial attempts with PHP's exec() function have not worked. The Python scripts I use to create the .mxml file work fine (using exec()), but I have not been able to get the mxmlc compiler to work.
After searching on the Web and on this site, I believe that using fcsh (instead of mxmlc) may be the way to go. Using fcsh would certainly compile the .mxml file faster (after the first run), and I think that fcsh can be launched as a service that might be able to be called from PHP.
On the other hand, maybe I am approaching this the wrong way. Would it be better to write a Flex application that calls fcsh and avoid using PHP?
Edit: Using fcshctl as hasseg suggested in his answer below worked very well. Thanks Ali.
The problem with calling fcsh from within scripts is that it works as an interactive shell instead of taking command-line arguments, compiling, and returning an exit status. There are different ways to get around this, which I've listed in this blog post of mine, where I mainly talk about fcshctl (which is my own solution for this,) but at the bottom of the post I've also listed other similar solutions to get fcsh integrated into nonstandard build workflows.
There are a few other ways in php to execute an external script. They are exec(), passthru(), system(), and backticks i.e. the key to the left of the 1 key. Each one has a different purpose and return mechanism.
You may have to put the command that executes your executable into a script and call that script via one of these functions.
Is there a particular reason why you can't use mxmlc directly? It seems like it would be easier to call than fcsh. Just specify all your compiler options in a XML file run it like mxmlc -load-config path/to/config.xml. You can find an example of the XML configuration format in FLEX_HOME/frameworks/flex-config.xml.