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$xxx = shell_exec('sudo chown -R user:user "/temp123" 2>&1');
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echo '|' . $xxx . '|';
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echo strlen($xxx);
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if ($temp1122 !== '') {
echo 'is not empty';
}
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$xxx = shell_exec('sudo chown -R user:user "/temp123" 2>&1');
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echo '|' . $xxx . '|';
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echo strlen($xxx);
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if ($temp1122 !== '') {
echo 'is not empty';
}