PHP English Letter Case Conversion function

Example 1, the first letter of each word is converted to uppercase: Ucwords () $foo = ' Hello world! '; $foo = Ucwords ($foo); Hello world! $bar = ' HELLO world! '; $bar = Ucwords ($bar); HELLO world! $bar = Ucwords (Strtolower ($bar)); Hello world! ?> Copy Code Example 2, first word capitalized: Ucfirst () $foo = ' Hello world! '; $foo = Ucfirst ($foo); Hello world! $bar = ' HELLO world! '; $bar = Ucfirst ($bar); HELLO world! $bar = Ucfirst (Strtolower ($bar)); Hello world! ?> Copy Code Example 3, first word lowercase: lcfirst () $foo = ' HelloWorld '; $foo = Lcfirst ($foo); HelloWorld $bar = ' HELLO world! '; $bar = Lcfirst ($bar); HELLO world! $bar = Lcfirst (Strtoupper ($bar)); HELLO world! ?> All letters capitalized: Strtoupper () All Letters lowercase: strtolower () Copy Code The above introduces a total of five English letter case conversion function functions, respectively, Ucwords, Ucfirst, Lcfirst, Strtoupper, Strtolower, each has a use.

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