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  1. #1
    New Coder
    Join Date
    Nov 2006
    Thanked 0 Times in 0 Posts

    php and javascript problem with google maps api

    i'm at my wits end with this now so i'm going to show you the entire two scripts in my web appliation to see if you can figure out why it won't work.

    the first script is map_data.php which pulls out coordinates out of a database and formats them in a way js should understand. you can see an example of the output data at http://www.nl-webspace.co.uk/~unn_p9...t/map_data.php

    //function getPubMarkers() { 
        $sql = mysql_query ( " select Latitude, Longitude, pubName, pubStreetNo, pubStreet, pubCity, pubCounty, 
                             pubPostcode, pubPhone from Pubs " ) or die( 'Invalid query: ' . mysql_error() ); 
            $markers = array(); 
        while( $elements = mysql_fetch_array($sql) ) { 
             $br = '<br>';        
         $markers[] =      '{'    
                                     ." 'latitude' : " .$elements[0] .',' 
                                                             ." 'longitude' : " .$elements[1] .',' 
                                     ." 'name' : '" .$elements[2] ."' " 
                                     //."'address': '" .$elements[3] .$br .$elements[4] .$br .$elements[5]    
                                     //                .$br .$elements[6] .$br .$elements[7] ."' ," 
                                    // ."'phone': '" .$elements[8] ."'" 
         //convert array into a single string variable  
         $markers  = implode( ' ', $markers ); 
         //remove the end comma in the string                             
         $markers = substr_replace($markers,"",-1);     
             $jscript = 'var markers =' .'[' .$markers .'];';  
            // return $jscript; 
    print $jscript; 

    the second script is map_function.js which i copied directly from a book:

    var centerLatitude = 54.52473;        // global var      
    var centerLongitude = -1.556582;         // global var 
    var startZoom = 13; 
    var map; 
    //function addMarker() 
    function init() 
    {                                                        // JavaScript coding from Purvis et al (2006: p.22, p.29) 
      if ( GBrowserIsCompatible() ) {                                 
        map = new GMap2(document.getElementById("mapviewer")); 
        map.addControl( new GSmallMapControl () ); 
        //map.addControl( new GMap2TypeControl () );           //undefined? 
        //map.addControl( new GLatLng ( centerLatitude, centreLongitude ), startZoom ); 
            //location = GLatLng(centerLatitude, centerLongitude); 
            map.setCenter(new GLatLng(centerLatitude, centerLongitude), startZoom); 
        for (id in markers) { 
            addMarker(markers[id].latitude, markers[id].longitude, markers[id].name);   // line 19 
     //opens map when browser window loads up 
    window.onload = init; 
    window.onunload = GUnload;
    the script addresses are referenced on the page header of my webpage in the order described. when i load the webpage i get a google map set at the speciified coordinates and zoom level but no markers. my debugger points to line 19 of map_functions.js and states 'error: object expected'

    please somone tell me what i can do to fix this

  • #2
    New Coder
    Join Date
    Jul 2005
    Thanked 0 Times in 0 Posts
    I think that you didn't add all of the required javascript for a map. For sure i could tell you that in your code second file i saw two problems you are using method which you didn't define no where in your code () and one class also didn't defined anywhere.
    If you can not find a decision, maybe you have to try to change a problem



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