如何使用Facebook Graph API（如共享按钮）共享图像

I want to open share pop up window of facebook when user clicks on a particular link (Not the share button). I want to do this in php and want to share an image.

Note: I want to provide the source of the image which comes dynamically.

Can any one help me please?

Please ask for more information if you want.

Thank you.

Update:

Below is my code:

The main page where the link is:

<li id="FB_post" style="display:none;"><a id="post_image_href"  href="https://www.facebook.com/sharer/sharer.php" target="_blank">Facebook</a></li>

In the js (Click event)

$("#post_image_href").click(function(e) {
        if($('.prodct_personalize_but a').html() != 'Cancel' && $('#zoom1').length>0 ){         
            $(this).attr('href','https://www.facebook.com/sharer/sharer.php?u='+$('#zoom1').attr('href'));
        }       
        else if ($(".image-main-container").css('display') != 'none')
        {
            if ($('.product_box23').css('display') != 'none')
            {

                e.preventDefault();
                setProperDynamicTextPosition();
                var data = $('#personalise_form').serialize();

                $('#loader_img').show();
                $.post(ajaxurl, data + '&action=save_personalise_image', function(response) {
                    if (response != '' && response != undefined) {
                        var Aryresponse = response.split('###');
                        $("#post_image_href").attr('href','https://www.facebook.com/sharer/sharer.php?u=' + Aryresponse[0]);
                        document.location.href = $("#post_image_href").attr('href');
                        $('#loader_img').hide();
                    }
                });
            }
        }
    });

Link which is created when I click on the Facebook link and go to facebook page:

In share dilog box: the current url of the browser and in the address bar: the updated link. For Ex. https://www.facebook.com/sharer/sharer.php?u=https://www.picpixa.com/wp-content/plugins/create-own-object/test-img/final_ProductImage_1405751994-2197.png

Please let me know if you want more information.

Update In JS Function:

I have made change in my js (click event function):

Below is the updated function:

$("#post_image_href").click(function(e) {
        var url='';
        if($('.prodct_personalize_but a').html() != 'Cancel' && $('#zoom1').length>0 ){         
            //$(this).attr('href','https://www.facebook.com/sharer/sharer.php?u='+$('#zoom1').attr('href'));
            url = 'https://www.facebook.com/sharer/sharer.php?u='+$('#zoom1').attr('href');
            console.log("If: "+ $('#zoom1').attr('href'));
            console.log("URL: "+ url);
        }       
        else if ($(".image-main-container").css('display') != 'none')
        {
            if ($('.product_box23').css('display') != 'none')
            {
                e.preventDefault();
                setProperDynamicTextPosition();
                var data = $('#personalise_form').serialize();

                $('#loader_img').show();
                $.post(ajaxurl, data + '&action=save_personalise_image', function(response) {
                    if (response != '' && response != undefined) {
                        var Aryresponse = response.split('###');
                        //$("#post_image_href").attr('href','https://www.facebook.com/sharer/sharer.php?u=' + Aryresponse[0]);
                       url = 'https://www.facebook.com/sharer/sharer.php?u=' + Aryresponse[0];
                       console.log("Else: "+ Aryresponse[0]);
                       console.log("URL: "+ url);
                       window.open(url, "popupWindow", "width=450,height=400,scrollbars=no"); //If I don't use this the pop up don't open.
                       //In fact this is og no use as this is not opening but still I have to put this here to run below winodw.open.
                        $('#loader_img').hide();
                    }
                });
            }
        }
        console.log("The URL is: "+url);
        window.open(url, "popupWindow", "width=450,height=400,scrollbars=no");
    });

Another Update: Imp. Info:

I thought that this might me the issue of the Meta Tags. And it is. I am giving all the required meta tags in the main page but when I did the debug of the url I am passing it is giving me the below result.

Click here to see the result

Can anyone find me a solution?