How to convert a string to lowercase in PHP?

@cortez.connelly 

In PHP, you can convert a string to lowercase using the strtolower() function. Here is an example:

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$string = "Hello World!";
$lowercaseString = strtolower($string);
echo $lowercaseString; // output: hello world!

The strtolower() function takes a string as an argument and returns a new string with all characters converted to lowercase. You can store the lowercase string in a new variable or overwrite the original string with the lowercase version.