How to convert lowercase to uppercase in php

This article mainly introduces "how to convert lowercase to uppercase in php". In daily operation, I believe that many people have doubts about how to convert lowercase to uppercase in php. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the question of "how to convert lowercase to uppercase in php". Next, please follow the editor to study!

Php first letter lowercase to uppercase function: 1, ucfirst () function, the first letter of the string can be converted to uppercase, syntax "ucfirst ($str)"; 2, ucwords () function, the first letter of each word in the string can be converted to uppercase, syntax "ucwords ($str)".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

There are two types of lowercase to uppercase functions in php:

The ucfirst () function, which converts the first letter of a string to uppercase

The ucwords () function converts the first letter of each word in a string to uppercase

1. Ucfirst () function

The ucfirst () function converts the first character in a string to uppercase.

Example:

2. Ucwords () function

The ucwords () function converts the first character of each word in a string to uppercase.

Syntax:

Ucwords ($string [, $delimiters = "\ t\ r\ n\ f\ v"])

Where $string is the string to be converted, and $delimiters is an optional parameter to represent the word separator. The default is space character, tab character, line feed character, carriage return character, horizontal line, and vertical bar.

Example:

Output:

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