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<?php
/*
function generate_pass(){
srand((double)microtime()*1000000); 
$gen_pass = md5(rand(0,9999999)); 
$first_pass1 = substr($gen_pass1,0,2);
$first_pass2 = substr($gen_pass1,3,4);
$first_pass3 = substr($gen_pass1,8,1);
$second_pass1 = strtoupper($first_pass3);
$second_pass2 =  $first_pass2;
$second_pass3 = strrev($first_pass1);
$finish_pass = $second_pass1 . $second_pass2 . $second_pass3;
return $finish_pass; }
echo generate_pass();
*/

srand((double)microtime()*1000000); 
$gen_pass = md5(rand(0,9999999)); 
$first_pass1 = substr($gen_pass1,0,2);
$first_pass2 = substr($gen_pass1,3,4);
$first_pass3 = substr($gen_pass1,8,1);
$second_pass1 = strtoupper($first_pass3);
$second_pass2 = $first_pass2;
$second_pass3 = strrev($first_pass1);
$finish_pass = $second_pass1 . $second_pass2 . $second_pass3;
echo $finish_pass;
?>

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srand((double)microtime()*1000000); 
$gen_pass = md5(rand(0,9999999)); 

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strrev()

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strtupper

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function gen_rand_string($hash)
{
	$chars = array( 'a', 'A', 'b', 'B', 'c', 'C', 'd', 'D', 'e', 'E', 'f', 'F', 'g', 'G', 'h', 'H', 'i', 'I', 'j', 'J',  'k', 'K', 'l', 'L', 'm', 'M', 'n', 'N', 'o', 'O', 'p', 'P', 'q', 'Q', 'r', 'R', 's', 'S', 't', 'T',  'u', 'U', 'v', 'V', 'w', 'W', 'x', 'X', 'y', 'Y', 'z', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0');
	
	$max_chars = count($chars) - 1;
	srand( (double) microtime()*1000000);
	
	$rand_str = '';
	for($i = 0; $i < 8; $i++)
	{
		$rand_str = ( $i == 0 ) ? $chars[rand(0, $max_chars)] : $rand_str . $chars[rand(0, $max_chars)];
	}

	return ( $hash ) ? md5($rand_str) : $rand_str;
}