how can I use php to create Latlng with address for google map V3

[AlexNAlex]

I done a lot research but can't find the way to create latlng in the google mapas below, how can I use address for the latlng number?the script is\[code\]function initialize(){ var latlng = new google.maps.LatLng(-41.251290,174.803638); var opt = { center:latlng, zoom:10, mapTypeId: google.maps.MapTypeId.ROADMAP, disableAutoPan:false, navigationControl:true, navigationControlOptions: {style:google.maps.NavigationControlStyle.SMALL }, mapTypeControl:true, mapTypeControlOptions: {style:google.maps.MapTypeControlStyle.DROPDOWN_MENU} }; var map = new google.maps.Map(document.getElementById("map"),opt); var marker= new google.maps.Marker({ position: new google.maps.LatLng(-41.251290,174.803638), title: "CodeGlobe", clickable: true, map: map});\[/code\]many thanks!!