//returns the [position]-th number that mt_rand([low],[high]) would return in PHP 5.3 when seeded with [seed] int seeded_mt_rand(int seed,int low, int high, int position){ int sd = seed; int[int] s; int mt_index = 623; //this is the MT recursion function, maybe? int twist(int m, int u,int v){ return ( m ^ ( ( ( u & 2147483648 ) | ( v & 2147483647 ) ) >> 1 ) ^ ( ( 4294967295 * ( u & 1 ) ) & 2567483615 ) ) ; } //this is the tempering function. God only knows what it does. int temper(int x){ int s_one; s_one = s[x]; s_one ^= (s_one >> 11); s_one ^= (s_one << 7) & 2636928640; s_one ^= (s_one << 15) & 4022730752; return ( s_one ^ (s_one >> 18) ); } //this is going to actually spit out random numbers in the specified range, allegedly. int mt_rand(int min, int max){ mt_index++; return (min + ( max - min + 1 ) * (( temper(mt_index) >> 1 ) / ( 2147483647 + 1.0))) ; } //this is how mt_srand() converts the seed into a 624 word initial condition. s[0] = sd & 2147483647; for j from 1 to 623{ s[j] = ( ( 1812433253 * ( s[j-1] ^ ( s[j-1] >> 30 ) )) + j ) & 4294967295 ; } //this generates the next 624 terms, which are the first 624 outputs of mt_rand() before tempering, probably? and I don't care about more than that, probably? for i from 0 to 623{ s[624+i] = twist(s[397+i],s[i],s[i+1]); } for i from 1 to position-1{ mt_rand(low, high); } return(mt_rand(low, high)); } //prints the values of the third and second mt_rand(0,100) calls after mt_srand(2). print(seeded_mt_rand(2,0,100,3)); print(seeded_mt_rand(2,0,100,2));