What are the differences between PHP3 and PHP4 and PHP5? what is the current stable version of PHP?
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Answer / Vipra Choudhary
Differences between PHP versions:n- PHP3 (1997): Deprecated in 2004, it introduced support for regular expressions, the session extension, and a more object-oriented style. However, it had several security issues.n- PHP4 (2000): Improved on PHP3 by addressing some security concerns, added support for Zend Engine, and introduced the concept of classes and objects. It's still partially supported but not recommended for new projects.n- PHP5 (2004): A major improvement, it introduced Object-Oriented Programming features, support for user-defined classes, and MySQLi extension. The current stable version is PHP 8.1 as of now.
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