Using random numbers in PHP

: This article describes how to use random numbers in PHP. For more information about PHP tutorials, see. Using random numbers in PHP

I want to create a random webpage, but I cannot use rand (). I heard that I want to initialize the random number, but how can I initialize it? please kindly advise. thank you!

// Step 1: initialize the seed
$ Seedarray = microtime ();
$ Seedstr = split ("", $ seedarray, 5 );
$ Seed = $ seedstr [0] * 10000;

// Step 2: Use the seed to initialize the random number generator
Srand ($ seed );

// Step 3: generate a random number within the specified range
$ Random = rand (10, 40 );

The above describes how to use random numbers in PHP, including some content, and hope to be helpful to friends who are interested in PHP tutorials.