在代码执行的每个步骤之后显示消息

Question

i have a snippet of code like this :

 $response = "<div style='font-size:18px;margin-top:2em;text-align:center;color:#173f5f;>";
 $response .= "Intializing sequence...";
    echo $response;
    $response .= "Starting compression of folders...";
    echo $response;
    $response .= "Compressing all photos now...";
    echo $response;
    $ph = compress('photos');
    $response .= "Photo compression complete.";
    $response .= "Compressing all signatures now...";
    echo $response;
    $sg = compress('signatures');
    $response .= "Signature compression complete.";
    $response .= "Compressing all excel files now...";
    echo $response;
    $excel = compress('uploads');
    $response .= "Excel files compression complete.</div>";
    echo $response;

i want the messages to be displayed after every line of compress function call but right now, its running the each call of the functions in a bunch and then displaying the messages in a bunch at the end that too every line repeated.

How can i solve this?

Answer 1

I think the others have missed the point of the question. You want each line of each to appear in "real time" as the script is processing rather than on execution completion. PHP by default doesn't output the buffer until the script execution has been completed or the buffer is full.

You can manually flush the buffer to screen when you want using this function.

function fcflush()
{
    static $output_handler = null;
    if ($output_handler === null) {
        $output_handler = @ini_get('output_handler');
    }
    if ($output_handler == 'ob_gzhandler') {
        // forcing a flush with this is very bad
        return;
    }
    flush();
    if (function_exists('ob_flush') AND function_exists('ob_get_length') AND ob_get_length() !== false) {
        @ob_flush();
    } else if (function_exists('ob_end_flush') AND function_exists('ob_start') AND function_exists('ob_get_length') AND ob_get_length() !== FALSE) {
        @ob_end_flush();
        @ob_start();
    }
}

And you use it in your code like this

echo "<div style='font-size:18px;margin-top:2em;text-align:center;color:#173f5f;>";
fcflush();
echo "Intializing sequence...";
fcflush();
echo "Starting compression of folders...";
fcflush();
echo $response .= "Compressing all photos now...";
fcflush();
    $ph = compress('photos');
echo "Photo compression complete.";
fcflush();
echo "Compressing all signatures now...";
fcflush();
    $sg = compress('signatures');
echo "Signature compression complete.";
fcflush();
echo "Compressing all excel files now...";
fcflush();
    $excel = compress('uploads');
echo "Excel files compression complete.</div>";
fcflush();

Also just echo out the lines directly ratehr than assigning them to $response then echoing out that.