doufei3561
doufei3561
2013-01-12 14:50

在在线c编译器中显示错误

已采纳

Hi all I have a c compiler up and running shows the output but the problem is that it dosen't show errors....

      shell_exec("gcc xyz.c -o ab.out ");

      $output=exec("./ab.out");
      echo $output;

So it is showing output but not any errors occurred while compiling. Any help is duly appreciated. Thanks in advance.

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1条回答

  • dongsonglian7303 dongsonglian7303 8年前

    Any error output from the command you run will go to STDERR and none of the exec, shell_exec functions will provide you that. One way is to redirect it

    exec("gcc test.c 2>&1", $out);
    

    The most cleaner way is to use proc_open function.

    $descriptorspec = array(
       1 => array("pipe", "w"),  // stdout
       2 => array("pipe", "w") // stderr 
    );
    
    $process = proc_open('gcc test.c', $descriptorspec, $pipes);
    
    if (is_resource($process)) {
        $stderr = stream_get_contents($pipes[2]);
        $stdout = stream_get_contents($pipes[1]);
        fclose($pipes[1]);
        fclose($pipes[2]);
        $return_value = proc_close($process);
    }
    
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