How to check if a string is one of the known values?

Question

Suppose I have the code above, how to write th

Answer 1

Try this:

if (in_array($a, array('are','abc','xyz','lmn')))
{
  // Code
}

http://php.net/manual/en/function.in-array.php

in_array — Checks if a value exists in an array

bool in_array ( mixed $needle , array $haystack [, bool $strict = FALSE ] ) Searches haystack for needle using loose comparison unless strict is set.