Replace any non-space whitespace, with a space : preg_replace « String « PHP

Replace any non-space whitespace, with a space

$str = " This line  contains\tliberal \r\n use of   whitespace.\n\n";

$str = preg_replace('/[\n\r\t]/', ' ', $str);

// Echo out: 'This line contains liberal use of whitespace.'
echo "<pre>{$str}</pre>";

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