How do I find the length of a string in PHP?

An extremely common thing to want to do in PHP is to find the length of a string. This may be for a variety of reasons, such as ensuring that the user has entered data of a sensible length into a form field (e.g. if their name is one letter long then there is probably something weird going on).

Here is a simple example of how this works:


<?php



$data = "hello world";

echo strlen($data); //11

?>

And that's all there is to it - simple but very well worth knowing because it is something that you'll need to know time and time again.

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How do I find the length of a string in PHP?

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