错误324（net :: ERR_EMPTY_RESPONSE）：服务器关闭连接而不发送任何数据

Question

I get this error

Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data.

in my PHP functions if I do not do an echo followed by a flush(). In these functions where I have to do the echo and flush(), I am using shell_exec() to run phantomjs and processing the result returned by it using simple_html_dom. I am also using a PHP framework called Laravel.

What cause this error, and why does echoing and doing a flush() fix this error?

Answer 1

Typically, Laravel expects output to be returned by your route or controller, not echoed. As an example, you might have

Route::get('foo', function() {
    return 'Hi';
});

Laravel will then output 'Hi' to the browser. Depending on your needs, you can either build this output yourself or make use of Laravel's View or Response classes to format the data in a way that is appropriate for your app.

If you absolutely need to flush output using echo, here's one possible way to do it through a view file.