PHP - Update string to lower using strtolower

strtolower can be used to update a string to have all lower case characters. For example, let's say you have a variable that contains the text Hello World.

$string = "Hello World";


In this example, the $string will be updated to lower.

$string = strtolower($string);


Now, when you echo $string . . .

echo $string;


. . . the following will be displayed.

hello world


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