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POHow to pass a json from php to javascript for jqPlot?
 

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  1. POHow to pass a json from php to javascript for jqPlot?
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    <p>Here is what I'm struggling with today:</p> <p>I'm trying to draw a graph using jqPlot library. The sql query outputs data which is converted to json in php by using <code>json_encode</code> and saved in hidden form field. This works fine and the actual field contains:</p> <pre><code>[["2011-12-10 12:01:00",271],["2011-12-10 12:13:05",132],["2011-12-11 12:17:55",388],["2011-12-10 22:03:40",5],["2011-12-11 12:10:54",830]] </code></pre> <p>Then the data from the form is retrieved in javascript by using:</p> <pre><code>var data = document.getElementById("dataarray").value; </code></pre> <p>in order to use it as a data for jqPlot later on. The <code>data</code> variable is correctly formatted and when checked with <code>document.write(data);</code>, outputs correct data in json format but whenever I place it inside the <code>plot1</code> variable to use data for the graph it throws an error <code>[object Object]</code> in Safari and <code>Uncaught #&lt;Object&gt;</code> in Firefox.</p> <p>The whole javascript code is as follows:</p> <pre><code>$(document).ready(function(){ var data = document.getElementById("dataarray").value; var test = [["2011-12-10 12:01:00",271],["2011-12-10 12:13:05",132],["2011-12-11 12:17:55",388],["2011-12-10 22:03:40",5],["2011-12-11 12:10:54",830]]; var plot1 = $.jqplot("chart_personal_2", [data], { title:"Data Point Highlighting", axes:{ xaxis:{ renderer:$.jqplot.DateAxisRenderer, numberTicks: 3, tickOptions:{ formatString:"%d/%m/%Y %H:%M:%S" } }, yaxis:{ label: "Elevation(m)", tickOptions:{ showMark: true } } }, highlighter: { show: true, sizeAdjust: 7.5 }, cursor: { show: false } }); }); </code></pre> <p>I even tried <code>output = String(data);</code> but it did not work either. I'm assuming that my <code>data</code> variable is an object that cannot be used as source data for jqPlot graph, it needs to be converted to string prior use? Correct me if I'm wrong.</p> <p>Hope somebody knows how to work it out without, thanks in advance!</p>
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