删除所有文本2位小数后放置PHP

Question

I'm trying to scrape a products price from a page, however unfortunately it's not in a nice clean div so I'm having to clear all the other junk.

Note: I have looked at several examples however they all assume you only have nice organised numbers in your variable, not raw HTML stuffed on the end.

An example of the string my variable may hold:

$2.87 <span>10% Off Sale</span>

I've played about with substr and sttrpos, read the manual and still can't figure it out on my own.

I want to just cut the string two digits after the first decimal place is found... No doubt it's extremely simple when you know how!

What I want to end up with:

$2.87

An example of the mess I've got myself into trying:

$whatIWant = substr($data, strrpos($data, ".") + 2);

Thanks in advance,

Answer 1

Try this solution:

<?php

$string = "$2.87 <span>10% Off Sale</span>";

$matches = array();
preg_match('/(\$\d+\.\d{2})/', $string, $matches);

var_dump($matches);

Output:

array(2) {
  [0]=>
  string(5) "$2.87"
  [1]=>
  string(5) "$2.87"
}

For more info (why result is array etc.) you should check PHP manual on preg_match() function: link