How to convert string case in php

How to convert string case in php: You can use strtolower() function and strtoupper() function to achieve string case conversion. The strtolower() function converts a string to lowercase and returns the string converted to lowercase.

In PHP, you can use the strtolower() function and strtoupper() function to achieve string case conversion. Let's introduce these two functions separately.

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strtolower() function converts the string to lowercase and returns the string converted to lowercase.

Syntax:

strtolower(string)

strtoupper() function converts the string to uppercase and returns the string converted to uppercase.

Grammar:

strtoupper(string)

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Code example:

Put all Convert characters to uppercase:

Convert all characters to lowercase:

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