如何使用system（）从c程序调用php脚本？

Question

I am writing a c program that will call a php script every few seconds in the background. So when you first call this program, it will create a child process through fork, and then exit the parent process, while the child process will be in an infinite loop. So far inside that infinte loop, I have the line system("echo hello >> daemon.txt") inside hte while loop, and it updates accordingly, so I know that the process is working. However when I call my script, it seems like it does not execute.

My php script timeChecker.php

#!/usr/bin/php <?php $handle =fopen("hello","a"); fwrite($handle, "boo "); fclose($handle); ?>

When called from commandline using either php timeChecker.php or ./timeChecker.php, the code executes as it should.

However, after trying multiple methods of calling the command such as system("php timeChecker.php"), system("/usr/bin/php timeChecker.php"), system("/usr/bin/php var/www/timeChecker.php"), system("/var/www/timeChecker.php") and all variations of that, the code still does not execute. Is there something simple that I am doing wrong? Or should I simply use a different method of checking the script?

Answer 1

As you are suggesting in your question, the php script is in "/var/www". Do you have the privileges to execute in that directory?

test is the c program calling the script through system(). I've made it work this way:

    sudo mkdir /var/www/script_dir
    sudo mv timeChecker.php /var/www/script_dir
    sudo mv test /var/www/script_dir
    sudo chown -R myusername:myusername /var/www/script_dir

Execute test from the script_dir.