Question

I am using a JSON string to pass a variable in JavaScript from PHP :

while( $row = mysql_fetch_array($result) )
        {
                $tmp = array('id'=>$row['id'], 'alert_type_id'=>$row['alert_type_id'], 'deviation'=>$row['deviation'], 'threshold_low'=>$row['threshold_low'], 'threshold_high'=>$row['threshold_high']) ;
                $settings[] = $tmp ;
        }

        echo '{"data":'.json_encode($settings).'}' ;

in Javascript, i am using the following snippet :

console.log( result ) ;                
var json = eval('('+ result +')') ;

and what appears in the Console is the following error :

1{"data":[{"id":"1","alert_type_id":"1","deviation":null,"threshold_low":"20","threshold_high":"80"}]}

SyntaxError: Expected token ')'

Could you please help me overcome this issue please ?
Many Thanks.

Answer 1

Well that line of code isn’t valid.

Write in the console:

'(1{"data":[{"id":"1","alert_type_id":"1","deviation":null,"threshold_low":"20","threshold_high":"80"}]})'

As this is what you’re passing to the eval function. I should give you the same error.

If you want to save that string in a variable you need to adjust it a bit:

eval('var x =' + result);

Anyway It looks like you’re doing something wrong, check again why do you need ti use the “evil” eval.