I have a PHP script which prints the output of a bash script (actually it is an expect script), which looks like this:
<?php
ob_implicit_flush(true);
ob_end_flush();
$cmd = "./expect_script.sh";
$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("pipe", "w")
);
$process = proc_open($cmd, $descriptorspec, $pipes, realpath('./'), array());
echo '<pre>';
if (is_resource($process)) {
while ($s = fgets($pipes[1])) {
print $s;
}
}
echo '</pre>';
?>
So I wanted to get the real time output with automatic scroll at the end of the page with every new line appearance and I found this: printing process output in realtime
Then I added the proposed html code to my script as follows:
<html><head>
<script language="javascript">
var int = self.setInterval("window.scrollBy(0,1000);", 200);
</script>
</head>
<body>
<?php
ob_implicit_flush(true);
ob_end_flush();
$cmd = "./expect_script.sh";
$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("pipe", "w")
);
$process = proc_open($cmd, $descriptorspec, $pipes, realpath('./'), array());
echo '<pre>';
if (is_resource($process)) {
while ($s = fgets($pipes[1])) {
print $s;
}
}
echo '</pre>';
?>
</body>
</html>
However, when script finishes the web browser won't let me browse to the top of the page because it is still scrolling to the bottom.
How shall avoid it so that I can browse once the script is finished?
you are using setInterval to repeat some task and never ask it to stop that.
you will need to stop setInterval from repeating itself , at the end of your php code add :
echo '</pre>';
echo '<script language="javascript">self.clearInterval(int);</script>';
also you will need to close your proc process :
if (is_resource($process)) {
while ($s = fgets($pipes[1])) {
print $s;
}
proc_close($process);
}