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Hello Friends Today, through this tutorial, I will tell you How to Use `strtolower()` function using PHP, PHP 8, PHP 8.1, PHP 8.2 With Example. The `strtolower()` function in PHP is used to convert a string to lowercase. It’s available in both PHP 8.1 and PHP 8.2. Here’s how you can use it with an example:
<?php // String to convert to lowercase $string = "Hello, World!"; // Convert the string to lowercase $lowercase_string = strtolower($string); // Output the lowercase string echo $lowercase_string; ?>
In this example:
1. The variable `$string` holds the original string `”Hello, World!”`.
2. The `strtolower()` function is applied to `$string`, converting all characters to lowercase.
3. The resulting lowercase string is stored in the variable `$lowercase_string`.
4. Finally, the lowercase string is echoed out.
The output will be:
hello, world!
You can use `strtolower()` to normalize strings for comparison or consistent output formatting, especially when dealing with case-insensitive comparisons or when you want to standardize the case of input data.