php - execute command

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<title>Execute command</title>
<h1>Execute command</h1>

<pre style="background:#ddd">
// Execution of commands may hang on Windows XP for some programs,
// wmic.exe is one of them. The solution is to use a command like
// this "echo | command...".


$output = shell_exec("echo | {$_ENV['SYSTEMROOT']}\System32\wbem\wmic.exe path win32_computersystemproduct get uuid");

if ($output) {
    echo "Command executed successfully.&lt;br&gt;";
    echo "Output: $output";
} else {
    echo "Command failed.";
}
</pre>

<?php

// Execution of commands may hang on Windows XP for some programs,
// wmic.exe is one of them. The solution is to use a command like
// this "echo | command..."

$output = shell_exec("echo | {$_ENV['SYSTEMROOT']}\System32\wbem\wmic.exe path win32_computersystemproduct get uuid");

if ($output) {
    echo "Command executed successfully.<br>";
    echo "Output: $output";
} else {
    echo "Command failed.";
}

?>