PHP String Length Without strlen()

Question

Just browsing over the latest release of the PHP coding standards, and something caught my eye:

http://svn.php.net/viewvc/php/php-src/trunk/CODING_STANDARDS?revision

Answer 1

Its been clearly mentioned that they talking about PHP Coding standards not about C function or extension of PHP engines.

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PHP Coding Standards
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This file lists several standards that any programmer, adding or changing code in PHP, should follow. Since this file was added at a very late stage of the development of PHP v3.0, the code base does not (yet) fully follow it, but it's going in that general direction. Since we are now well into the version 4 releases, many sections have been recoded to use these rules.

Still I didn't found any relevant information about string length property but I think in future they might release the information if it's related to new version of PHP.

Please post if someone found useful information about this.