What is this set of benchmarks all about

Check a specific $_POST variable's existence and equality to a comparison value.

Data Sets

1. The $_POST variable is set and equal to the comparison value.
2. The $_POST variable is set but not equal to the comparison value.
3. The $_POST variable is not set.

Algorithms

The algorithms of the specific checks (and combinations) can be categorized as follows:

1. Use isset and direct access.
2. Use filter_input.
3. Use filter_input and cache the value.

What is this benchmark all about

Filter all array elements having a key from a predefined set of keys.

Data Sets

1. An array having 8 elements, and another array having 2 random keys of the first array (as values).
2. An array having 64 elements, and another array having 16 random keys of the first array (as values).
3. An array having 512 elements, and another array having 128 random keys of the first array (as values).

Algorithms

1. Loop through the full array, and check for each key if it exists in the key array.
2. Loop through the full array, and check for each key if the according element is set in the flipped key array.
3. Loop through the keys of the full array, and check for each one if it exists in the key array.
4. Loop through the keys of the full array, and check for each one if the according element is set in the flipped key array.
5. Set the full array to the intersection by key (!) of itself and the flipped key array.