Is == in PHP a case-sensitive string comparison?

Question

I was unable to find this on php.net. Is the double equal sign (==) case sensitive when used to compare strings in PHP?

user_10151775 · Answer

You could try comparing with a hash function instead

  if( md5('string1') == md5('string2') ) {
    // strings are equal
  }else {
    // strings are not equal
  }