>From a design perspective, I prefer to open database connections only when strictly necessary, and close them when I'm done using them. You could, I believe, start a session on your index page and save your database connection in a $_SESSION variable (then retrieve the database connection from $_SESSION in the viewDataTable.php script), but this could result in an arbitrary number of database connections hanging open on your server until the sessions are closed or timed out. I think you are asking for problems at that point.
On Saturday, August 17, 2013 7:37:57 AM UTC-4, Razee Hussein-Jamal wrote: > > I found the problem, > > My database connection is established on a seperate php file which is > included into index.php, form index.php file the system navigates to > different pages for example the viewDataTable.php which has the ajax script > that calls the php code for query data from database. However even if the > database connection is established globally to all the pages, the > connection is lost once the ajax script runs. > > So I had to include it once again, but wonder if there are any other ways > to solve this? > > Thank you! > > > On 17 August 2013 11:50, Razee Hussein-Jamal <[email protected]<javascript:> > > wrote: > >> I tried to run the PHP code directly from the URL it worked fine, it >> returned the JSON string correctly but once again I tried to call this PHP >> code from AJAX and the row returned to null, as it's not entering the while >> loop as I mentioned earlier. The domain is the same of the AJAX script and >> data source script is the same.... >> This is driving me crazy! >> >> If you could please look at my code maybe I am missing sth, >> http://stackoverflow.com/questions/18274356/display-google-chart-with-json-and-php >> >> >> >> >> On 17 August 2013 04:03, asgallant <[email protected] >> <javascript:>>wrote: >> >>> I don't think that would change anything. Calling the PHP script from >>> an AJAX call also shouldn't return any different results. If it works >>> right when you visit the URL directly from your browser, it should work >>> when you pull it from AJAX. The only time you might expect a different >>> result is if the domain of the HTML file making the AJAX call is different >>> from the domain of the data source script. >>> >>> >>> On Friday, August 16, 2013 4:23:55 PM UTC-4, Razee Hussein-Jamal wrote: >>> >>>> I should also mention I have changed this line of code : >>>> >>>> $selectQuery = 'SELECT * FROM competitive_daily_volume'; >>>> $result = mysql_query($selectQuery); >>>> $rows = array(); >>>> if($result){ >>>> >>>> while($row = mysql_fetch_assoc($result)){..**........} >>>> } >>>> >>>> To this: >>>> >>>> $selectQuery = 'SELECT * FROM competitive_daily_volume'; >>>> >>>> $rows = array(); >>>> if($result = mysql_query($selectQuery)){ >>>> >>>> while($row = mysql_fetch_array($result)){ ........} >>>> >>>> } >>>> >>>> But the rows is null, I don't think it enters the while loop when this >>>> file has been called from the JavaScript. >>>> >>>> Would appreciate any kind of help, thank you in advance >>>> Sent from my iPhone >>>> >>>> On 16 aug 2013, at 23:17, Razee <[email protected]> wrote: >>>> >>>> It seems that it doesn't enter the while loop when this file is called >>>> from the JavaScript. Could it be that the >>>> >>>> while($row = mysql_fetch_assoc($result)) >>>>> >>>> >>>> Blocks the Ajax when it's called, the rows on the Json string is null >>>> but cols is not and its correct when it's been passed. >>>> >>>> I really need help with this part I have been working on it for days, >>>> there is a mistake which I can't find. >>>> >>>> >>>> On 16 aug 2013, at 17:43, asgallant <[email protected]> wrote: >>>> >>>> Your PHP code looks fine. Navigate to that script in a browser and see >>>> if it is outputting a JSON string there. >>>> >>>> On Friday, August 16, 2013 8:37:56 AM UTC-4, Razee Hussein-Jamal wrote: >>>>> >>>>> Thank you for your help, this is the code I have inside the json.php >>>>> the connection to database is done in a separate file, I don't get the >>>>> JSON >>>>> objects when I call this file in the ajax script. >>>>> >>>>> <?php >>>>> >>>>> $selectQuery = 'SELECT * FROM competitive_daily_volume'; >>>>> $result = mysql_query($selectQuery); >>>>> $rows = array(); >>>>> if($result){ >>>>> >>>>> while($row = mysql_fetch_assoc($result)){ >>>>> $temp = array(); >>>>> $temp[] = array("v"=> $row['Date']); >>>>> $temp[] = array("v"=> $row['UserId']); >>>>> $temp[] = array("v"=> $row['CementBrand']); >>>>> $temp[] = array("v"=> $row['VolumeBGLP']); >>>>> $temp[] = array("v"=> $row['Type']); >>>>> >>>>> $rows[] = array("c"=> $temp); >>>>> >>>>> } >>>>> >>>>> } >>>>> >>>>> $table = array(); >>>>> $table['cols'] = array( >>>>> array("id"=>"A","label"=>"**Date","type"=>"string"), >>>>> array("id"=>"B","label"=>"**User","type"=>"string"), >>>>> array("id"=>"C","label"=>"**Cement Brand","type"=>"string"), >>>>> array("id"=>"D","label"=>"**Volume","type"=>"string"), >>>>> array("id"=>"E","label"=>"**Type","type"=>"string") >>>>> ); >>>>> >>>>> $table['rows'] = $rows; >>>>> $jsonObj = json_encode($table); >>>>> >>>>> echo $jsonObj; >>>>> >>>>> ?> >>>>> >>>>> >>>>> >>>>> On 12 August 2013 23:24, asgallant <[email protected]> wrote: >>>>> >>>>>> I don't get that error when I use your JSON: >>>>>> http://jsfiddle.net/asgallant/**R8tA9/<http://jsfiddle.net/asgallant/R8tA9/>. >>>>>> >>>>>> Can you post an example script (preferably on jsfiddle, you can use the >>>>>> example I linked to as a starting point) that replicates the issue? >>>>>> >>>>>> >>>>>> On Monday, August 12, 2013 3:19:07 PM UTC-4, Razee Hussein-Jamal >>>>>> wrote: >>>>>> >>>>>>> >>>>>>> I am trying to view my JSON string I receive from a database and >>>>>>> view it in google tables, however I receive this error: Invalid >>>>>>> JSON string: error: 1046 >>>>>>> >>>>>>> In viewTable.php a part of the script is : >>>>>>> >>>>>>> function drawVisualization() { >>>>>>> >>>>>>> var jsonData = $.ajax({ >>>>>>> url: "json.php", // make this url point to the data file >>>>>>> dataType: "json", >>>>>>> async: false >>>>>>> }).responseText; >>>>>>> var data = new google.visualization.**DataTable**(jsonData); >>>>>>> >>>>>>> visualization = new google.visualization.Table(**doc** >>>>>>> ument.getElementById('**table'))**; >>>>>>> visualization.draw(data, null); >>>>>>> >>>>>>> } >>>>>>> >>>>>>> in json.php file : I query data from database and encode it to JSON >>>>>>> string which I then echo $jsonString, >>>>>>> >>>>>>> An example of JSON string output : >>>>>>> >>>>>>> >>>>>>> {"cols": >>>>>>> [{"id":"A","label":"Date","**typ**e":"string"},{"id":"B","**label"** >>>>>>> :"User","type":"string"}**,{"id"**:"C","label":"Cement >>>>>>> Brand","type":"string"},{"id":****"D","label":"Volume","type":"**s** >>>>>>> tring"},{"id":"E","label":"**Typ**e","type":"string"}], >>>>>>> >>>>>>> "rows": >>>>>>> [{"c":[{"v":"08-06-2013"},{"v"****:"[email protected]"},{"v":"**Mu** >>>>>>> thana"},{"v":"27"},{"v":"**Local Plant"}]}] >>>>>>> >>>>>>> } >>>>>>> >>>>>>> >>>>>>> I would really appreciate any help with this problem as I can't find >>>>>>> the reason for this invalid JSON string as it seems to be correct. >>>>>>> Thank you >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>> You received this message because you are subscribed to a topic in >>>>>> the Google Groups "Google Visualization API" group. >>>>>> To unsubscribe from this topic, visit https://groups.google.com/d/** >>>>>> topic/google-visualization-**api/_4eMVS6Hdnk/unsubscribe<https://groups.google.com/d/topic/google-visualization-api/_4eMVS6Hdnk/unsubscribe> >>>>>> . >>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>> google-visualization-api+**[email protected]. >>>>>> To post to this group, send email to google-visua...@googlegroups.** >>>>>> com. >>>>>> Visit this group at http://groups.google.com/** >>>>>> group/google-visualization-api<http://groups.google.com/group/google-visualization-api> >>>>>> **. >>>>>> For more options, visit >>>>>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> >>>>>> . >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Razee Hussein-Jamal >>>>> Masters in Embedded Systems, >>>>> Department of Information Technology, >>>>> Uppsala University - Sweden >>>>> Mobile Phone : +46764158553 (Sweden) , +9647701524721 (N.Iraq), >>>>> +905058622477 (Turkey) >>>>> >>>>> -- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "Google Visualization API" group. >>>> To unsubscribe from this topic, visit https://groups.google.com/d/** >>>> topic/google-visualization-**api/_4eMVS6Hdnk/unsubscribe<https://groups.google.com/d/topic/google-visualization-api/_4eMVS6Hdnk/unsubscribe> >>>> . >>>> To unsubscribe from this group and all its topics, send an email to >>>> google-visualization-api+**[email protected]. >>>> To post to this group, send email to google-visua...@**googlegroups.com >>>> . >>>> Visit this group at http://groups.google.com/** >>>> group/google-visualization-api<http://groups.google.com/group/google-visualization-api> >>>> **. >>>> For more options, visit >>>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> >>>> . >>>> >>>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "Google Visualization API" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/google-visualization-api/_4eMVS6Hdnk/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected] <javascript:>. >>> To post to this group, send email to >>> [email protected]<javascript:> >>> . >>> Visit this group at >>> http://groups.google.com/group/google-visualization-api. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> >> >> -- >> Razee Hussein-Jamal >> Masters in Embedded Systems, >> Department of Information Technology, >> Uppsala University - Sweden >> Mobile Phone : +46764158553 (Sweden) , +9647701524721 (N.Iraq), >> +905058622477 (Turkey) >> >> > > > -- > Razee Hussein-Jamal > Masters in Embedded Systems, > Department of Information Technology, > Uppsala University - Sweden > Mobile Phone : +46764158553 (Sweden) , +9647701524721 (N.Iraq), > +905058622477 (Turkey) > > -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. 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