How to implement uppercase conversion in php

php implementation method of converting to uppercase

In PHP, you can use the strtoupper() function to convert to uppercase.

strtoupper() definition and usage

strtoupper() function converts a string to uppercase.

Note: This function is binary safe.

Related functions:

strtolower() - Convert the string to lowercase

lcfirst() - Convert the first character in the string to lowercase

ucfirst() - Converts the first character in the string to uppercase

ucwords() - Converts the first character of each word in the string to uppercase

Syntax

strtoupper(string)

Parameters

string Required. Specifies the string to be converted.

Return value: Returns the string converted to uppercase.

PHP version: 4

Convert all characters to uppercase:

Running result:

HELLO WORLD!

Recommended: "PHP Tutorial》

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