English title case format

Title case or Headline case It is a capital style, used to present the titles of published works or artistic works in English. This tool uses APA Style. Title capitalization format: All words should be capitalized, except for secondary words (usually articles, short prepositions and conjunctions) that are not the first or last word of the title. Secondary words not capitalized in this tool include a, an, the, and, but, or, for, nor, on, at, to, by, in, of, up, as, so, yet, off, if, per, via, out Etc.

Letter case conversion on program

PHP： strtolower() The string is converted to lowercase, strtoupper() The string is converted to uppercase; ucfirst() Converts the first character to uppercase, ucwords() Converts the first letter of each word to uppercase.
JavaScript： toLowerCase() Returns a string in which all alphabetic characters are converted to lowercase; toUpperCase() Returns a string in which all alphabetic characters are converted to uppercase.
Python： capitalize() Change the first letter of the string to uppercase and the other letters to lowercase; upper() Method to convert lowercase letters in a string to uppercase letters; lower() Method to convert all uppercase characters in the string to lowercase characters; title() Method returns a "captioned" string, that is, all words start with uppercase and the rest are lowercase.