DPC2020: Top 10 PHP coding traps - Damien Seguy

PHP developers, beware of common coding traps and improve your code quality with expert insights and best practices from Damien Seguy.

Key takeaways

Be aware of the different types of comparisons, such as loose and strict equality, and avoid using loose equality (==) when possible.
Use parentheses to clarify the order of operations when using complex expressions.
Avoid using the array operator ([]) with a function call, as it can lead to unexpected behavior.
Use trim() and strip_tags() to cleanse input data before processing it.
Be mindful of the difference between isset() and array_key_exists(), as they behave differently.
Avoid using echo to concatenate strings, as it can lead to unexpected behavior.
Use . to concatenate strings, and avoid using + to concatenate strings, as it can lead to unexpected behavior.
Be aware of the memory implications of using array_concat() and implode().
Consider using constants instead of static variables.
Be aware of the limitations of define() and consider using const instead.
Avoid using strpos() without specifying the second argument, as it can lead to unexpected behavior.
Be mindful of the difference between Officers and () when using function calls.
Avoid using eval() and create_function() when possible, as they can lead to security vulnerabilities.
Consider using a code analyzer, such as PHPStan, to detect errors and improve code quality.
Be aware of the different memory allocation strategies in PHP, and consider using clearstatcache() to clear the cache.
Avoid using include() with a bare path, as it can lead to security vulnerabilities.
Consider using namespace to organize code and avoid naming conflicts.
Be aware of the differences between PHP versions, and consider upgrading to a newer version if possible.
Consider using a JavaScript runtime, such as Node.js, to run PHP code.
Avoid using passthru() with an undefined variable, as it can lead to unexpected behavior.

DPC2020: Top 10 PHP coding traps - Damien Seguy

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