$re = '/^(?!(?:[^\r\n0-9]*[0-9]){4})(?!(?:\S* ){2})[a-zA-Z0-9 &]{8,}$/m';
$str = 'abcD &EFG
ABCde f123
&&12ADSD&&
a bcD &EFG
AB5Cde f123
&&12ADSD&&34
1234567
nope';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php