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PHP (programming language): How do you convert an integer into a string in PHP?
That's helpful. Can you give me an example of a built-in PHP function?
Of course, one example is the 'strlen' function, which is used to get the length of a string. For example, if you have a string "hello", you can use 'strlen' to get its length, like this:

$string = "hello";
$length = strlen($string);

This will set the variable $length to 5, which is the length of the string "hello".