String case conversion functions such as strtolower () strtoupper ()

Source: Internet
Author: User

$ STR = "Mary Had A Little Lamb and she loved it so ";

String strtolower (string$str)-Convert the string to lowercase (all characters) // print Mary had a little lamb and she loved it so

Return Value: returns the converted string.

String strtoupper (string$string)-Convert the string to uppercase (all characters) and print Mary had a little lamb and she loved it so

Return Value: returns the converted uppercase string.

String ucfirst (string$str)-Convert the first letter of the string to uppercase Hello nihao? // Print Hello nihao?

Return Value: return result string

String lcfirst (string$str)-Make the first character of a string lowercase

Return Value: returns the converted string Hello nihao? // Print Hello nihao?

String ucwords (string$str)-Converts the first letter of each word in the string to uppercase.

 

SetstrThe first character of each word (if the first character is a letter) is converted to an upper-case letter, and this string is returned.

Here, the word is defined as a substring that follows the white space characters (space characters, tabs, line breaks, carriage returns, horizontal lines, and vertical lines.

 

String case conversion functions such as strtolower () strtoupper ()

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