PHP versions new features, depcrepated functions

PHP 5.4 is Released — What’s New?

https://www.sitepoint.com/whats-new-in-php-54/
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Deprecated features in PHP 5.4.x

http://php.net/manual/en/migration54.deprecated.php

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Migrating from PHP 5.3.x to PHP 5.4.x

http://php.net/manual/en/migration54.php
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PHP 5.3:
Deprecated features in PHP 5.3.x
http://php.net/manual/en/migration53.deprecated.php

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List of deprecated functions between php4.4 -> php7:

https://stackoverflow.com/questions/38850009/list-of-deprecated-functions-between-php4-4-php7