PHP English letter and case conversion function summary _ PHP Tutorial

PHP uppercase/Lowercase conversion function summary. The code for copying the first letter of each word into uppercase: ucwords () is as follows :? Php $ foohelloworld !; $ Fooucwords ($ foo); HelloWorld! $ BarHELLOWORLD !; $ Barucwor the initial letter of each word is converted to uppercase: ucwords ()

The code is as follows:

$ Foo = 'Hello world! ';
$ Foo = ucwords ($ foo); // Hello World!

$ Bar = 'Hello WORLD! ';
$ Bar = ucwords ($ bar); // hello world!
$ Bar = ucwords (strtolower ($ bar); // Hello World!
?>

The first letter is capitalized: ucfirst ()

The code is as follows:

$ Foo = 'Hello world! ';
$ Foo = ucfirst ($ foo); // Hello world!

$ Bar = 'Hello WORLD! ';
$ Bar = ucfirst ($ bar); // hello world!
$ Bar = ucfirst (strtolower ($ bar); // Hello world!
?>

The first letter of a word becomes smaller: lcfirst ()

The code is as follows:

$ Foo = 'helloworld ';
$ Foo = lcfirst ($ foo); // helloWorld

$ Bar = 'Hello WORLD! ';
$ Bar = lcfirst ($ bar); // hELLO WORLD!
$ Bar = lcfirst (strtoupper ($ bar); // hELLO WORLD!
?>

Uppercase for all letters: strtoupper ()
Write down all letters: strtolower ()

Pipeline () code is as follows :? Php $ foo = 'Hello world! '; $ Foo = ucwords ($ foo); // Hello World! $ Bar = 'Hello WORLD! '; $ Bar = ucwor...