从没有属性或标签的现场表读取数字

Question

I have a problem. I want to create a script. It should read two numbers from other website but no id and class in div:

<td>
  1 IRR = <b>0.0698</b> Gold 
</td>

How can I read this numbers without any id or class in php? or if it is hard in php how can I do it in js? or ajax?

Answer 1

For a server-side (PHP) solution, regular expressions are always a favourite.

// Your HTML variable
$html = "<td>
    1 IRR = <b>0.0698</b> Gold 
</td>";

preg_replace_callback("/<td>(?:[\s
]+)?([0-9\.]+) irr = <b>([0-9\.]+)<\/b> gold(?:[\s
]+)?<\/td>/im", function($m, $numa, $numb)
{
    // Your first number is in $numa
    // And your second is in $numb
}, $html);

For client side (js), you could use jQuery's filter function and a regular expression. It wouldn't be amazing in terms of performance but it would certainly do the trick.

var regexp = /^([0-9\.]+) irr = ([0-9\.]+) gold$/i;

$('td').filter(function()
{
    return $(this).text().trim().match(regexp);
}).each(function()
{
    var numbers = $(this).text().trim().replace(regexp, '$1,$2').split(',');

    // Now `numbers` is an array with the two numbers inside
});