Making a String Uppercase, Lowercase, or Capitalized

One occasional problem with PHP is that MySQL supports case-insensitive character fields, but strings in PHP are case sensitive. In a query, MySQL makes no distinction between the words Ferrett, FERRETT, and FerReTt, but as strings in PHP, they have nothing in common. So in PHP you may need to change the case of characters in a string before you compare or print them.

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