使用JS或PHP从span元素中获取值

Question

I have a few values in a few spans and I want to extract each number to a string and then perform calculations. I have the following code which will just get the value from the "example" id but how can I get the values from all the spans as well

$(function() {
    $a = $('#example').text();
    window.alert($a);    
});

<div id="example">
<span>1</span>
<span>,</span>
<span>9</span>
<span>9</span>
<span>3</span>
<span>,</span>
<span>1</span>
</div>

Answer 1

Since you're using jQuery you can loop through them easily:

$('#example span').each(function(){
   console.log($(this).text());
})

Please, quit using alert() for troubleshooting., use console.log() instead.

EDIT: Here is a start for getting them into a string:

var numbers = [];
$('#example span').each(function(){
    if(',' != $(this).text()) {
    console.log($(this).text());
    numbers.push($(this).text());
  }
})
console.log(numbers)
var numberString = numbers.toString();
console.log(numberString);

returns

1,9,9,3,1

If you don't want commas in the string then use join() (whatever you put in the join argument becomes the string separator):

var numberString = numbers.join('');

returns

19931