How To Fix PHP Random Being The Same

Having spent some time dealing with random numbers in C#, i was a little stumped when coming to php when I found myself having random numbers coming out the same. I know from dealing with this before that it is caused by the server being so fast that the seed doesnt have time to change. Holding onto the random context in C# is how to work around this but with PHP, random is not part of an object that you can instantiate. So how do you deal with PHP rand producing the same numbers while in a loop. For example.

foreach($words as $word)
    if(mt_rand(0,1) == 1)
        //do this
        //do that

Using mt_rand was the first suggestion, but since I was already using PHP7 I was made aware that the old rand methods are now just aliases for these new random functions. Either way, it didnt fix the problem. The solution was to come up with some kind of seed that would be unique for my problem that I could feed into the library to ensure that PHP would come up with a random value each time.

I have come up with a rather simple seed method that will ensure that you will get a completely random value, every time by simply having a piece of text to produce a random seed.  This method will take the string and convert the letters to their ASCII value (or something like that) to produce a random number. All of these random numbers are combined into a string to produce a completely random number. This allowed me to reset the random seed for each loop I was doing and ensured that each word I was dealing with, had a proper random number generated to go along with it.

function SetRandomSeed($string)
    for($i = 0; $i < strlen($string); $i++) 
        $result .= ord($string[$i]);
    mt_srand($result . time());


Related Articles

Related Questions

Function Keys Reversing Between Fn Actions And Normal

My keyboard has the usual F1 to F12 keys along the top. I use these for shortcuts in various applications. These keys also have...

Whirlpool Oven F6E6: Appliance Manager 1 Board Communication

I have a brand new Whirlpool oven W11I OM1 4MS2 H or (859991549450). I bought it alongside the microwave combi oven. I have had...

Whats the difference between the Tapo P100 and the P105?

There are a few different Tapo smart plugs. The P100 and P110 differ based on the smart power monitoring feature but where does the...


Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Latest Tools

Memory Converter

Converting values between various metric measurements is usually quite simple as there will be 1000 of the smaller unit in the next larger unit....

Bitrate Converter

Below you will find a bitrate converter. This tool will allow you to enter a bitrate value, in one of many different formats and...

Aesthetic Text Generator

There are various ways to make your social media profile seem more unique, some of which are not as easy to implement as others....

Aspect Ratio Calculator For Images

Aspect ratio is the ratio between the height and width of an image. If you want to resize an image by 100 pixels, you...

Add Text To Image

Use this free tool to add text to an image. Simply select the image file that you want to overlay text onto and you...

JavaScript Multi-line String Builder

Javascript did not always support multi-line strings. If you attempted to create a string variable using quotes, putting a line break into the source...

Latest Posts

Latest Questions