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How Can I Get Real-Time Process Output and Gracefully Kill Processes in PHP?
How Can I Get Real-Time Process Output and Gracefully Kill Processes in PHP?
Dec 19, 2024 pm 05:28 PM
Real-Time Process Output in PHP
Running processes that output in real-time on a web page can enhance user experience and provide immediate feedback. In PHP, it's possible to achieve this using the proc_open() function.
Obtaining Real-Time Output
To obtain real-time output from a process, use proc_open() as follows:
$cmd = "ping 127.0.0.1";
$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("pipe", "w")
);
$process = proc_open($cmd, $descriptorspec, $pipes, realpath('./'), array());
// Display output
echo "<pre class="brush:php;toolbar:false">";
if (is_resource($process)) {
while ($s = fgets($pipes[1])) {
print $s;
flush();
}
}
echo "";
In this code, the ping process's output is continuously read from the pipe $pipes[1] and displayed.
Killing the Process on Page Exit
To kill a process when a page is exited, use the following code:
register_shutdown_function(function() use ($process) {
proc_terminate($process);
// Wait for process to terminate gracefully
proc_close($process);
});
This code registers a shutdown function that terminates a process when the script exits. It also gracefully waits for the process to finish before closing it.
By leveraging proc_open() and register_shutdown_function(), you can execute processes and obtain their real-time output in PHP. When the page exits, the process is automatically terminated to prevent any lingering system resources.
The above is the detailed content of How Can I Get Real-Time Process Output and Gracefully Kill Processes in PHP?. For more information, please follow other related articles on the PHP Chinese website!
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