PHP Random String Function

<br /><?php<br />/**<br /> * @version $Id: iString.php 25 2007-05-24 16:12:11Z $<br /> *<br /> */<br />class iString {<br /> protected $_digits = '0123456789';<br /> protected $_lowercaseAlphas = 'abcdefghijklmnopqrstuvwxyz';<br /> protected $_uppercaseAlphas = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';<br /> protected $_characters;<br /><br /> public function getRandom($minLength = 4, $maxLength = 4, $hasDigit = true,<br /> $hasLowercaseAlpha = false, $hasUppercaseAlpha = false) {<br /> $stringLength = rand($minLength, $maxLength);<br /> if ($hasDigit) $this->_characters = $this->_digits;<br /> if ($hasLowercaseAlpha) $this->_characters .= $this->_lowercaseAlphas;<br /> if ($hasUppercaseAlpha) $this->_characters .= $this->_uppercaseAlphas;<br /> $charactersLength = strlen($this->_characters);<br /> $string = '';<br /> for($i=0;$i<$stringLength;$i++) {<br /> $pos = rand(0, $charactersLength-1);<br /> $string .= substr($this->_characters, $pos, 1);<br /> }<br /> return $string;<br /> }<br /><br /> /**<br /> * encrypt a string<br /> *<br /> * @param string $string<br /> * @return string<br /> */<br /> public function encrypt( $string ) {<br /> return md5(md5($string));<br /> }<br /><br />}<br />?><br />