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  1. PO
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    <p>You could take a look at the <a href="http://php.net/manual/en/function.flush.php" rel="nofollow">flush() function</a></p> <p>"Flushes the write buffers of PHP and whatever backend PHP is using (CGI, a web server, etc). This attempts to push current output all the way to the browser with a few caveats."</p> <p>You probably also have to call <code>ob_flush;</code> So if you put the following on strategic places it should work:</p> <pre><code>echo "something"; flush(); ob_flush(); </code></pre> <p>You can let PHP run infinite with <code>set_time_limit(0)</code>. See the <a href="http://php.net/manual/en/function.set-time-limit.php" rel="nofollow">PHP Manual</a>. So put this line on top of your php file.</p> <p>Also check out the <code>default_socket_timeout</code> setting if you have problems after 60 seconds.</p> <p><strong>Edit</strong>: Running the script here now for 30 minutes without a problem. Even httpd cpu is low now. (due to the usleep i think)</p> <p>My working code:</p> <pre><code>&lt;? error_reporting(E_ALL); ini_set('display_errors', '1'); set_time_limit(0); ob_start(); function flush_buffers(){ ob_end_flush(); ob_flush(); flush(); ob_start(); } echo date("d-m-Y H:i:s"); ?&gt; &lt;body style="background-color: yellow;"&gt; &lt;div style="margin: auto; margin-top: 50px;"&gt; &lt;div style="margin: auto; width: 200px; font-weight: bold; font-size: 20px; margin-bottom: 20px; color: darkgreen;"&gt;Real Time View&lt;/div&gt; &lt;?php //Create a UDP socket if(!($socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP))) { $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); die("Couldn't create socket: [$errorcode] $errormsg \n"); } echo "Socket created &lt;br&gt;"; flush_buffers(); if( !socket_set_nonblock($socket) ){ $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); die("Could not nonblock socket : [$errorcode] $errormsg \n"); } // Bind the source address if( !socket_bind($socket, "0.0.0.0" , 9999) ){ $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); die("Could not bind socket : [$errorcode] $errormsg \n"); } echo "Socket bind OK &lt;br&gt;"; flush_buffers(); socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array("sec"=&gt;1, "usec"=&gt;100)); socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO, array("sec"=&gt;1, "usec"=&gt;100)); try { while(1){ usleep(0.5 * 1000000); // 0.5 seconds if (False === ($r = socket_read($socket, 1024))) { $errorcode = socket_last_error(); $errormsg = socket_strerror($errorcode); if ($errorcode!='11') { echo "error reading : [$errorcode] $errormsg &lt;br&gt;\n"; } } echo $r; if ($r!='') { echo ".&lt;br&gt;"; } flush_buffers(); } } finally { socket_close($socket); } ?&gt; &lt;/div&gt; &lt;/body&gt; &lt;? ob_end_flush(); ?&gt; </code></pre>
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    1. POhow to get UDP traffic via PHP and show it in a web page?
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    1. USRik
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    1. VO
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    1. COthank you for the answer. flush doesn't work. It seems that using it nothing changes. It seems that the application memorize all the output and when it stops running the output will be written. Another problem is that the application stops to run after 30 seconds without any reason
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    2. COThe default for limit on running php script is 30 seconds. You can change that with set_time_limit (int $seconds). I'll take a look at your source.
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    3. COHow does this answer the OP's broader question?
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