PHP – Regex: Check If String Contains Character Other Than A-Z

if (preg_match (‘/[^a-z]/i’, $string_to_check)) {
// The string contains characters other than a-z and A-Z
}

Ubuntu: Check 64 bit

uname -a

should display text like this

Linux <hostname> 2.6.17-10-generic #2 SMP Fri Oct 13 15:34:39 UTC 2006 x86_64 GNU/Linux

x86_64 means 64 bit