{"id":6089,"date":"2018-06-22T17:42:23","date_gmt":"2018-06-22T17:42:23","guid":{"rendered":"https:\/\/www.jquery-az.com\/?p=6089"},"modified":"2023-09-28T09:45:01","modified_gmt":"2023-09-28T09:45:01","slug":"generate-random-numbers-php-rand-function","status":"publish","type":"post","link":"https:\/\/www.jquery-az.com\/generate-random-numbers-php-rand-function\/","title":{"rendered":"How to generate random numbers in PHP?"},"content":{"rendered":"

In your PHP application, you may be required to write an algo that generates random numbers that can be used for PINs, passwords, or some other purpose.<\/p>\n

The PHP rand<\/strong> function generates a random number (integer) from zero to the maximum number returned by getrandmax() function<\/strong>. The maximum number in Windows platform can be (for example) 32768<\/strong>.<\/p>\n

An example:<\/p>\n

echo\u00a0rand();<\/p><\/blockquote>\n

You may also specify a range for generating a random number e.g. 100 to 200. This is done by using the optional parameters in the\u00a0rand function as shown in the syntax below.<\/p>\n

int rand ( int $minimum , int $maximum )<\/p><\/blockquote>\n

Where $miinum number specifies the starting number for the random number to be generated. The $maximum specifies the highest number.<\/p>\n

Both these parameters are optional, so you may omit and let the rand function generate a number.<\/p>\n

The section below shows using rand function with and without parameters along with using rand multiple times for generating random numbers by the single statement \u2013 so keep reading.<\/p>\n

The example of rand without parameters<\/strong><\/h3>\n

In this example, the rand() PHP function is used without providing minimum or maximum numbers. The random number is simply displayed by using PHP echo statement<\/a>:<\/p>\n

The code:<\/strong><\/p>\n

<?php\r\n\r\necho \"The random number without parameters: \" .(rand());\r\n\r\n?><\/pre>\n
As I executed this code in windows platform, the following was the output:<\/p>\n
The random number without parameters: 26456<\/p><\/blockquote>\n
The number will change for every refresh of the web browser as you can see in the example page.<\/p>\n
Using range for the random number<\/strong><\/h3>\n
Now, I used the minimum and maximum parameters in the rand<\/strong> function. The random number should be between 50 to 500. This is how it is specified:<\/p>\n
Code:<\/strong><\/p>\n
<?php\r\necho \"The random number between 50-500: \" .(rand(50,500));\r\n?><\/pre>\n
Sample output:<\/strong><\/p>\n
The random number between 50-500: 129<\/p><\/blockquote>\n
Copy\/Paste the above code to your editor and refresh the page to see what random number is displayed. This should be between 50 to 500<\/strong> and change on every refresh.<\/p>\n
Note:<\/strong> The 50 and 500 are inclusive in the above example.<\/p>\n
A more usable example of rand function<\/strong><\/h3>\n
In the following example, the rand function is used several times with different ranges for creating a number.<\/p>\n
In that way, an accumulative number can be created based on certain rules. For example, the first part of the random code should be between 1-10. The second should be 100 to 1000 and then you may concatenate a fixed number etc.<\/p>\n
PHP code:<\/h6>\n
<?php\r\n\r\n$gen_random = 420 .rand(25,50) .rand(100,1000) .rand(1000,10000) ;\r\n\r\n\r\n\r\necho \"Multiple rand number: \" .$gen_random;\r\n\r\n?><\/pre>\n
The output as ran this code on the local system:<\/p>\n
Multiple rand numbers: 420338781727<\/p>\n","protected":false},"excerpt":{"rendered":"
The PHP rand function generates a random number (integer) from zero to maximum number returned by getrandmax() function. The maximum number in windows platform can be (for example) 32768.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"yoast_head":"\nHow to Generate random numbers by PHP RAND function<\/title>\n<meta name=\"description\" content=\"The PHP rand function generates a random number (integer) from zero to maximum number returned by getrandmax() function.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jquery-az.com\/generate-random-numbers-php-rand-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Generate random numbers by PHP RAND function\" \/>\n<meta property=\"og:description\" content=\"The PHP rand function 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