There is logic that cannot be expressed in code...

Question

//Example
$a = [4,6,5,9,7,8,2,5,6,4,1,2,3,8,9];
$b = [3,7,5,9,7,8,2,5,8,4,1,2,3,8,0]; Randomly generate an array like $a and store it in the 001.txt file . Then randomly generate an array and determine whether it exists in 001.txt. If it does not exist, store the array in the 001.txt file. If it exists, stop the program.

faic***g · Answer

It's not difficult, think about it carefully