generate many random letters with php -

i want make lot of random words have code create 1

function generaterandomstring($length = 10) {     $characters = '0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz';     $characterslength = strlen($characters);     $randomstring = '';     ($i = 0; $i < $length; $i++) {         $randomstring .= $characters[rand(0, $characterslength - 1)];     }     return $randomstring; } echo generaterandomstring(); 

can tell me how make them more without clicking refresh day?

this works me:

function generaterandomstring($length = 10) {     $characters = '0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz';     $characterslength = strlen($characters);     $randomstring = '';     ($i = 0; $i < $length; $i++) {         $randomstring .= $characters[rand(0, $characterslength - 1)];     }     return $randomstring; }  ($i=0; $i < 10; $i++) {     echo generaterandomstring() . "<br>"; }