检查文本字段是否包含A-Z和＆

Question

How to check if a string only contains a-z, A-Z or & sign?

if (!preg_match('/[^A-Za-z]+&/', $sender_t))
{
    echo 'good';
}
else { echo 'no good'; }

Answer 1

You need something like this

$sender_t = '&&';
if (!preg_match('/[^A-Za-z&]/', $sender_t))
{
   echo 'good';
}
else 
{ 
   echo 'no good'; 
}