Undefined index:i on line 2

[Heinz Stapff]

I'm using ul element onclick javascript function to change div innerHTML with get mysql query but the innerHTML returns 'You have an error in your SQL syntax "undefined" at line 2'.

 

Onclick external.js Ajax

function getproduct(i){
if(i=' '){
document.getElementById('f1').innerHTML=' ';
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("f1").innerHTML=xmlhttp.responseText; //errors declared here
}
}
xmlhttp.open("GET","getproduct.php?q="+i,true);
xmlhttp.send();
}

var jewelry= document.getElementById('jewelry').childNodes;   
for (i = 0; i < jewelry.length; i++) {   
if (jewelry[i].className == 'item') {  // excludes class="item disabled" 
jewelry[i].onclick = function() {   
alert(this.id+': Is sending your request.');  // this actually gets the right id
var i=this.id; // declared variable?
getproduct(i);//used variable returned undefined index?
}   
}   
} 

window.onload=getproduct();

 

getproduct.php?

<?php
$q=$_GET["i"];//undefined index i at line 2
$link=mysql_connect("localhost","root","root")or die(mysql_error( ));
mysql_select_db("bwi",$link) or die(mysql_error( ));
$query=mysql_query("select FROM* [B]'".$i."'[/B]")or die(mysql_error( ));
//undefined variable i line 7 syntax error on quotes?

 

As I'm new to Ajax and PHP I have to know how to define i and the corect syntax in the select FROM * statement. Any thoughts greatly appreciated

[megan]

really look at what the error code says

You have an error in your SQL syntax

 

so it is not the ajax or the php it is the SQL statement you need to be looking at

 

in your sql you currently have "select FROM *" see anything wrong about that?

SQL is very logical - you are wanting to say select everything from the table or "select * FROM"

[Heinz Stapff]

megan Thanks, you're right. The 'i' still returns 'undefined index: i on line 2 and syntax error on line 7 ie

select * From '".i."'"

I'd guess that the ajax call is not getting the id of the li item clicked for the php $q=$_GET["i"]; as well as the wrong syntax for the quote double quotes shown above. Will have to get back and try again on the pc that has the server. Thank again for pointing out that simple syntax error.

[Heinz Stapff]

megan

The new errors produced after corecting the select*FROM statement are as follows

Notice: Undefined index: i in D:\use_ide_1\UniServer\www\getproduct.php on line 2

 

Notice: Undefined variable: i in D:\use_ide_1\UniServer\www\getproduct.php on line 7

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''..'' at line 1

 

So I'm guessing the 'i' is not being defined which could be the javascript ajax call function or the onclick itself is not passing var i=this.id to getproduct() corectly. I'll have to post in javascript forum.