[?] PHP ?? Function

[?] PHP ?? Function? Self: http://www.cnblogs.com/mrray/archive/2011/05/18/2050233.html

Strtoupper ($ string); // replace all with uppercase letters

Strtolower ($ string); // replace all with lowercase letters

Ucwords ($ string); // replace the first letter of a word with an uppercase letter.

The strrpos () function is used to locate the last occurrence of a string in another string. [String,]

PHP Data type conversion is a forced conversion. The PHP Data types that can be converted include:

(Int), (integer): convert to integer (float), (double), (real): convert to float (string): convert to string (bool), (boolean): convert to Boolean type (array): convert to array (object): convert to object

There are three conversion methods for PHP Data types:

The target type enclosed in parentheses before the variable to be converted uses three conversion functions of specific types: intval (), floatval (), strval () settype (mixed var, string type)

First conversion method: (int) (bool) (float) (string) (array) (object)

Second conversion method: intval () floatval () strval ()

Third conversion method: settype ();