php - when there is no data found set null -


I am using jquery to get value from php scripts and keep them in between tags. But sometimes nothing is sent as value. Then I would like to show words nonsense. $ Ajax ({type: "POST", url: "Relations / Relations Report" data: { "Clent" Clint, "project" project, "Van" Van, "Baby" tot}, datatype: 'json "error: function () {alert (" Onvoldoende gegevens beschikbaar om rapportage to genereren. ");}, success: function (data) {// Plaats data op de juiste Plek D table var = data in titel. Titel; Projektid = Detakprojektid; Kansolklog (Projektid); $ Kpost ( "Rpportge / Rpport_ditel" {Projektid: "Projektid"}); Projektype = Detakprojektype, Projektlandr = Detakprojektlandr, Projektype = data. Projecttype, statusproject = data.statusproject, startproject = data.startproject, deadlineproj ect = data.deadlineproject, omzetproject = data.omzetproject, kostenproject = data.kostenproject, totaalurenproject = data.totaalurenproject, totaalminutenproject = data. totaalminutenproject, urenkostenproject = data.urenkostenproject; to var str = ''; (var i = 0; Lane = titel.length; I & lt; lane; i ++) {str + = "& lt; tr;" + "to "; str + =" & lt; TD & gt; "+ Ti Telephones [i] +" & lt; / Td> "; str + =" & lt; TD & gt; "+ Projector slider [i] +" & lt; / td> "; str + =" & lt; TD & gt; "+ Project Type [I] +" & lt; / td> "; str + =" & lt; TD & gt; "+ Status project [i] +" & lt; / Td> "; str + =" & lt; TD & gt; "+ Start Project [i] +" & lt; / td> "; str + =" & lt; TD & gt; "+ Deadline Project [i] +" & lt; / Td> "; str + =" & lt; TD & gt; "+" and # 8364; "+ Omžate Project [I] +" & lt; / td> "; str + =" & lt; TD & gt; "+" and # 8364; "+ CostenProject [i] +" & lt; / Td> "Var via project = omegle project [ii] - kostenproject [i]; str + =" & lt; TD & gt; "+" and # 8364; "+ MargeProject +" & lt; / Td> "; str + =" & lt; TD & gt; "+ Totaalurenproject [i] +": "+ totaalminutenproject [i] +" & lt; / Td> "; str + =" & lt; TD & gt; "+" and # 8364; "+ Urenkostenproject [i] +" & lt; / Td> "+" & lt; / Tr & gt; ";} Alert (JSON.stringify (data)); $ (" # Table_1 Dune "). Attachment (ARR);}});

Is it the right thing to do for an empty variable?

It depends, if the totaaluernproject is null or undefined , If it is zero then there is no need to check it, just print the value and it is zero, other intelligent if it can be undefined, you can do this: 

  totaalurenproject [I] = totaalurenproject [i] || "zero"; str + = "& Lt; Td & gt; + + Totaalurenproject [i] + ":" + totaalurenproject [i];   
 This will give you results in both cases with a more controlled state

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