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up vote 6 down vote favorite
5

I have a page as below;

<head>
<script type="text/javascript" src="jquery-1.6.1.js"></script>
<script type="text/javascript">
$(document).ready( function() {
$('#prev').click(function() {
  $.ajax({
  type: 'POST',
  url: 'ajax.php',
  data: 'id=testdata',
  cache: false,
  success: function(result) {
    $('#content1').html(result[0]);
  },
  });
});
});
</script>
</head>
<body>
<table>
<tr>
<td id="prev">prev</td>
<td id="content1">X</td>
<td id="next">next</td>
</tr>
</table>
</body>

and a php file ajax.php to handle ajax requests as;

<?php
$array = array(1,2,3,4,5,6);
echo $array;
?>

But when I click, I am getting A instead of array[0]. How can I fix this??

Thanks in advance...

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4 Answers

up vote 17 down vote accepted

you cannot access array (php array) from js try 

<?php
$array = array(1,2,3,4,5,6);
echo json_encode($array);
?>

and js 

$(document).ready( function() {
$('#prev').click(function() {
  $.ajax({
  type: 'POST',
  url: 'ajax.php',
  data: 'id=testdata',
  dataType: 'json',
  cache: false,
  success: function(result) {
    $('#content1').html(result[0]);
  },
  });
});
});
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i got it..... Thanks... :) –  blasteralfred Ψ Jun 18 '11 at 11:45
 
Yes,it is also the answer i'm looking for.Thanks~ –  Simon Wang Apr 17 at 7:12
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up vote 6 down vote

When you echo $array;, the result is Array, result[0] then represents the first character in Array which is A.

One way to handle this problem would be like this:

ajax.php

<?php
$array = array(1,2,3,4,5,6);
foreach($array as $a)
    echo $a.",";
?>

jquery code

$(function(){ /* short for $(document).ready(function(){ */

    $('#prev').click(function(){

        $.ajax({type:    'POST',
                 url:     'ajax.php',
                 data:    'id=testdata',
                 cache:   false,
                 success: function(data){
                     var tmp = data.split(",");
                     $('#content1').html(tmp[0]);
                 }
                });
    });

});
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up vote 3 down vote

you cannot access array (php array) from js try

<?php
$array = array(1,2,3,4,5,6);
echo implode('~',$array);
?>

and js

$(document).ready( function() {
$('#prev').click(function() {
  $.ajax({
  type: 'POST',
  url: 'ajax.php',
  data: 'id=testdata',
  cache: false,
  success: function(data) {
    result=data.split('~');
    $('#content1').html(result[0]);
  },
  });
});
});
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up vote 0 down vote

When you do echo $array;, PHP will simply echo 'Array' since it can't convert an array to a string. So The 'A' that you are actually getting is the first letter of Array, which is correct.

You might actually need 

echo json_encode($array);

This should get you what you want.

EDIT : And obviously, you'd need to change your JS to work with JSON instead of just text (as pointed out by @genesis)

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it would not work as JSON has to be decoded by js ;) –  genesis Jun 18 '11 at 11:43
 
@genesis, you're right of course. Noted in the answer, thanks. –  JohnP Jun 18 '11 at 11:48
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