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What best practice should be followed to avoid overwriting SESSION variables in PHP?

To avoid overwriting SESSION variables in PHP, it is recommended to check if the variable already exists before setting it again. This can be achieved...

What potential security risks are associated with using SELECT * in SQL queries in PHP scripts?

Using SELECT * in SQL queries can expose sensitive information and lead to potential security risks such as SQL injection attacks. It is recommended t...

What are the potential pitfalls of relying solely on cookies for user authentication in PHP?

Relying solely on cookies for user authentication in PHP can be risky as cookies can be easily tampered with or stolen. To enhance security, it is rec...

What are the security concerns associated with using md5 hashing for passwords in PHP, and what alternative methods should be considered for password hashing?

Using md5 hashing for passwords in PHP is not secure because it is considered weak and vulnerable to brute force attacks. Instead, it is recommended t...

What are the potential pitfalls of storing dates in a non-standard format like date("d.m.Y") in PHP?

Storing dates in a non-standard format like date("d.m.Y") in PHP can lead to issues when sorting, comparing, or manipulating dates. It is recommended...