What are some potential pitfalls of using outdated versions of PHP, such as PHP4, in web development?

Using outdated versions of PHP, such as PHP4, in web development can lead to security vulnerabilities, compatibility issues with modern libraries and frameworks, and poor performance. To solve this issue, it is recommended to upgrade to a newer version of PHP that is actively supported and maintained by the PHP community. 

// Upgrade the PHP version to a newer supported version

Keywords

Outdated versions PHP4 security vulnerabilities deprecated functions compatibility issues

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