adding new PHP classes to get a bit more OO into my code

[php-utility-classes.git] / include / classes / useragent.php-class

<?php
class userAgent {
  // userAgent PHP class
  // get user agent and tell us what Browser is accessing
  //
  // function userAgent()
  //   CONSTRUCTOR; reads UA string and gets info from that into our variables.
  //
  // var $uastring
  //   the plain User Agent string
  // var $brand
  //   returns the User Agent brand name
  // var $version
  //   the User Agent version
  //
  // function isns()
  //   returns true if User Agent seems to be Netscape brand, false if not
  // function isns4()
  //   returns true if User Agent seems to be Netscape Communicator 4.x, false if not
  // function isie()
  //   returns true if User Agent seems to be a version of Internet Exploder, false if not
  // function geckobased()
  //   returns true if User Agent seems to be a Gecko-based browser, false if not
  // function geckodate()
  //   returns the Gecko date when it's a Gecko-based browser, 0 if not

  // debug: var $uastring = "Mozilla/5.0 (compatible; Konqueror/3; Linux 2.4.18; X11; i686)";
  var $uastring;
  var $brand;
  var $version;

  function userAgent() {
    // *** constructor ***
    // get raw UA string
    $this->uastring = $_SERVER["HTTP_USER_AGENT"];

    // get UA brand and version
    $this->brand = "Unknown"; $this->version = 0;
    if (ereg("([0-9a-zA-Z\.]+)/([0-9a-zA-Z\.]+)", $this->uastring, $regs)) {
      $this->uabrand = $regs[1]; // this is a reasonable default :)
      $this->version = $regs[2]; // this is a reasonable default :)
    }
    if (ereg("Mozilla/([0-9a-zA-Z\.]+)", $this->uastring, $regs) && !strstr($this->uastring, "compatible;") && !strstr($this->uastring, "Gecko/")) {
      $this->brand = "Netscape";
      $this->version = $regs[1];
      if (intval($this->version) == 4) { $this->brand .= " Communicator"; }
    }
    elseif (ereg("Netscape6/([0-9a-zA-Z\.]+)", $this->uastring, $regs)) {
      $this->brand = "Netscape";
      $this->version = $regs[1];
    }
    elseif (ereg("Netscape/([0-9a-zA-Z\.]+)", $this->uastring, $regs)) {
      $this->brand = "Netscape";
      $this->version = $regs[1];
    }
    elseif (ereg("rv:([0-9a-zA-Z\.]+)", $this->uastring, $regs) && strstr($this->uastring, "Mozilla/") && strstr($this->uastring, "Gecko/")) {
      $this->brand = "Mozilla";
      $this->version = $regs[1];
    }
    elseif (ereg("Opera[ /]([0-9a-zA-Z\.]+)", $this->uastring, $regs)) {
      $this->brand = "Opera";
      $this->version = $regs[1];
    }
    elseif (ereg("Konqueror/([0-9a-zA-Z\.]+)", $this->uastring, $regs)) {
      $this->brand = "Konqueror";
      $this->version = $regs[1];
    }
    elseif (ereg("MSIE ([0-9a-zA-Z\.]+)", $this->uastring, $regs)) {
      $this->brand = "Microsoft Internet Explorer";
      $this->version = $regs[1];
    }
  }

  function isns() {
    // set it static so that we don't have to call it that often
    static $is_ns;
    if (!isset($is_ns)) {
      $is_ns = false;
      if (strstr($this->brand, "Netscape")) {
        $is_ns = true;
      }
    }
  return $is_ns;
  }

  function isns4() {
    // set it static so that we don't have to call it that often
    static $is_ns4;
    if (!isset($is_ns4)) {
      $is_ns4 = false;
      if (strstr($this->brand, "Netscape") && (intval($this->version) == 4)) {
        $is_ns4 = true;
      }
    }
  return $is_ns4;
  }

  function isie() {
    // set it static so that we don't have to call it that often
    static $is_ie;
    if (!isset($is_ie)) {
      $is_ie = false;
      if (strstr($this->brand, "Internet Explorer")) {
        $is_ie = true;
      }
    }
  return $is_ie;
  }

  function geckobased() {
    // set it static so that we don't have to call it that often
    static $is_gecko;
    if (!isset($is_gecko)) {
      $is_gecko = false;
      if (strstr($this->uastring, "Gecko/")) {
        $is_gecko = true;
      }
    }
  return $is_gecko;
  }

  function geckodate() {
    // set it static so that we don't have to call it that often
    static $gdate;
    if (!isset($gdate)) {
      $gdate = 0;
      if (ereg("Gecko/([0-9]+)", $this->uastring, $regs)) {
        $gdate = $regs[1];
      }
    }
  return $gdate;
  }
}
?>