How to convert case in php

php method to convert uppercase to lowercase

1. Convert the string to lowercase

strtolower(): This function converts all characters of the incoming string parameter to lowercase and puts them back into the string in small definite form.

Example:

<?php
    $str = "I want To FLY";
    $str = strtolower($str);
    echo $str;
?>

Output result:

i want to fly

2. Convert characters to uppercase

strtoupper(): The function of this function is opposite to the strtolower function. It converts all the characters of the incoming character parameters into uppercase

Write and return the string in uppercase. The usage is the same as strtolowe().

3. Convert the first character of the string to uppercase

usfilst(): This function The function is to change the first character of the string to uppercase. This function returns the string with the first character uppercase.

The usage is the same as strtolowe().

4. Change each character of the string to uppercase Convert the first character of a word to uppercase

ucwords(): This function converts the first character of each word in the passed string to uppercase. For example, "hello world", after passing this function

After processing, "Hello Word" will be returned. The usage is the same as strtolowe().

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