Php and javascript working on localhost but not on hosted website

问题

I implemented a search form that has 3 drop down <select> tags The first 2 drop downs have static options while I used a javascript to create the options of the third drop down. The javascript is based on onchange event of 2nd drop down and is stored in searchideas.js file

This searchideas.js file calls datasupplier.php using GET method through XMLHttpRequest. All works fine on my localhost but when I hosted it on the live website, the options for the third drop down does not gets generated. xmlhttp.readyState becomes 4 but xmlhttp.status becomes 500 which corresponds to Internal server error.

I have also moved the searchideas.js and datasupplier.php in the same folder where my webpage containing the dropdowns is located but to no avail.

How can I over come this error?

My searchideas.js is:

function searchideas( )
{
    var state = document.getElementById("stateID").value; 
    var county = document.getElementById("countyID").value; 
    var town = document.getElementById("townID").value;
    var xmlhttp;
    if (window.XMLHttpRequest)
    {
        xmlhttp=new XMLHttpRequest();
    }
    else
    {
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function()
    {        
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
            var selectList = document.getElementById('townID');
            var val = xmlhttp.responseText; 
            var jsonData = JSON.parse(val); 
            for (var i in jsonData) 
            {
              var option = document.createElement('option');
              option.value = "http://www.mywebsite.com" + i;
              option.text = jsonData[i];
              selectList.appendChild(option);
            }
        }   
    } 
    var url = "http://www.mywebsite.com/sites/all/themes/danland/datasupplier.php?stateID=" + state + "&countyID=" + county + "&townID=" + town;    
    xmlhttp.open("GET",url,true);
    xmlhttp.send();
}

My datasupplier.php is:

<?php 

$stateID = $_GET['stateID'];
$countyID = $_GET['countyID'];
$townID = $_GET['townID'];

$states = array();
$states['SC'] = "Stories";
$states['TL'] = "Novels";
$counties = array();
$counties['SC']['PRACT'] = 'By Interest';
$counties['SC']['SERV'] = 'By Choice';
$counties['TL']['PRACT'] = 'By Interest';
$counties['TL']['SERV'] = 'By Choice';

$towns = array();
$towns['SC']['PRACT']['/index.php?q=sc%3Fpract%3Ffai'] = "Fairy Tale";
$towns['SC']['PRACT']['/index.php?q=sc%3Fpract%3Fedu'] = "Education";
$towns['SC']['SERV']['/index.php?q=sc%3Fserv%3Ffic'] = "Fiction";

$towns['TL']['PRACT']['/index.php?q=tl%3Fpract%3Fzom'] = "Zombie";
$towns['TL']['PRACT']['/index.php?q=tl%3Fpract%3Fedu'] = "Education";
$towns['TL']['SERV']['/index.php?q=tl%3Fserv%3Fsal'] = "Sales";
$towns['TL']['SERV']['/index.php?q=tl%3Fserv%3Fstr'] = "Strategy";



if($stateID && !$countyID && !$townID)
{
    echo json_encode( $counties[$stateID] );
} 
elseif( $stateID && $countyID && !$townID ) 
{
    echo json_encode( $towns[$stateID][$countyID] );
}
elseif( isset($villages[$stateID][$countyID][$townID]) ) 
{
    echo json_encode( $villages[$stateID][$countyID][$townID] );
} 
else 
{
    echo '{}';
}

?>

回答1:

I had the same problem as you because of file permission , changing permission from 755 to 644 worked. If yours is related to permissions, try setting datasupplier.php's permission to 644.

来源：https://stackoverflow.com/questions/23693792/php-and-javascript-working-on-localhost-but-not-on-hosted-website

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