Not usually, but it could change the order that random numbers are generated in, the range of random numbers, the number of random numbers, or how random numbers are used. Using the same seed preserves things only so long as everything else regarding random number generation and usage remains the same. Since we cannot count on PHP continuing to use the same randomization algorithm, it is best to store the final result in a constant and to use that.
Not usually, but it could change the order that random numbers are generated in, the range of random numbers, the number of random numbers, or how random numbers are used. Using the same seed preserves things only so long as everything else regarding random number generation and usage remains the same. Since we cannot count on PHP continuing to use the same randomization algorithm, it is best to store the final result in a constant and to use that.