Jquery获取所有数组元素

Question

I am programming beginner..

Code

 <script type="text/javascript">
     $(function() {
       var course_category = "<?php echo $_REQUEST['cities'] ?>";
       alert(course_category); // alerts as Array
   });

when i do print_r in php ( print_r($cities); ) i get

  Array ( [0] => BLR [1] => DEL [2] => HYD [3] => MUM

now i want to print the array in above jquery

try

 $.each(course_category, function(key,value){
   alert(value); 

}};

printns A,r,r,a,y

Answer 1

正确的方法是使用JSON：

var list = <?php echo json_encode($_REQUEST['cities']); ?>;

Answer 2

I assume you currently have two problems:

1. Your PHP array is not encoded in any way, that JavaScript understand. Just use json_encode() here.

2. If you receive an object (and arrays are just objects for that matter), you can't just output them using alert() , if you really want to see the contents. Again, you may use JSON.stringify() to solve this.

$(function() {
 var course_category = "<?php echo json_encode( $_REQUEST['cities'] ); ?>";
 alert( JSON.stringify( course_category) );
});

If you want to use the array contents later on, refer to plain for loops or jQuery's each() .

Answer 3

<?php
$output = '';
foreach($_REQUEST['cities'] as $city){
    $output .= "'$city',";
}
$output = rtrim(",", $output);
?>
var course_category = [<?php echo $output; ?>];

Answer 4

You can use .each in jQuery to iterate an array

  $.each(course_category , function(index, item) {
});

Actually i dont know about php.But you can iterate an array using the above code in jQuery