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What are the most common mistakes in PHP?
But its ease of use notwithstanding, PHP has evolved into quite a sophisticated language with many frameworks, nuances, and subtleties that can bite developers, leading to hours of hair-pulling debugging. This article highlights ten of the more common mistakes that PHP developers need to beware of.
Is it possible to redirect to a different page in PHP?
Is it possible to redirect a user to a different page through the use of PHP? Say the user goes to www.example.com/page.php and I want to redirect them to www.example.com/index.php, how would I do so without the use of a meta refresh? Is it possible?
Is it OK to use undefined Index in PHP?
That code will work fine (i.e., it will output test without generating any “undefined index” message), but depending on what you’re trying to accomplish, this approach may or may not be adequate. In particular, the above code will not modify the original $values array.
Is there a way to resuming in PHP?
Resuming — obligatory die () / exit () is some urban legend that has nothing to do with actual PHP. It has nothing to do with client “respecting” the Location: header. Sending a header does not stop PHP execution, regardless of the client used. Don’t forget to die ()/exit ()! Output JavaScript from PHP using echo, which will do the job.
Why are redundant fields and tables a bad practice?
Redundant fields and tables are a nightmare for developers, since they require business logic to keep many version of the same information up to date. This is an overhead that can be avoided if normalization rules are followed thoroughly.
What happens if there are no constraints in database design?
If no constraints or very few constraints are implemented from the design stage, the data integrity will have to rely entirely on the business logic, making it susceptible to human error.
Is it bad to ignore the rules of database design?
Ignoring these goals will lead to designs that are flawed in their basics, although structurally and mathematically correct. Designing a database is not a deterministic task; two database designers may follow all the rules and normalization principles for a given problem, and in most cases they will generate different data layouts.