Passing a string from php to c using exec()

This is a discussion on Passing a string from php to c using exec() within the C Programming forums, part of the General Programming Boards category; I am trying to pass a string as a parameter from PHP to a c file, using exec() Here's the ...

  1. #1
    Registered User javaeyes's Avatar
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    Passing a string from php to c using exec()

    I am trying to pass a string as a parameter from PHP to a c file, using exec()
    Here's the PHP:
    Code:
    $mystring = "foobar";
    echo exec('./cairo21 -a $mystring');
    That goes fines.
    The problem is when I am trying to accept the string into my compiled c file:
    C Code:
    Code:
    char webcompanyname[256] = getopt(argc,argv, "a:");
    Compiler: error: invalid initializer
    cairo21.c:69:2: warning: initialization makes integer from pointer without a cast.
    Apparently getopt returns an integer. Is that integer a pointer to the string? Thoughts greatly appreciated.

  2. #2
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by javaeyes
    Apparently getopt returns an integer. Is that integer a pointer to the string?
    Read the manual, e.g., getopt.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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