Question

I need to save many variables in text file and later retrieve any one random data from the text document.

For Example …i need to add 31231231 to the below text file

213123123
213123124
123412321

and i need to retrieve random value from above text file ..for example 213123124 from above text file

Answer 1

To write to the already existing file :

file_put_contents("file.txt","\n31231231",FILE_APPEND);

To get a random value from the file :

$file = file("file.txt")
$len = count($file);
$rand  = rand ( 0, $len-1 );
echo $file[$rand];

Edit: While retrieving the PHP_EOL is included so do this:

echo intval($file[$rand]);

Edit: Seeing as intval() returns the max_int for numbers that exceed int specs, just use trim();

echo trim($file[$rand])