从字符串中提取所有<a href="#"># </a>标记的最佳方法是什么

I'm currently working with the CakePHP 3.x framework and for a new function I need to extract all <a hrefs="#">#</a> from a text, but I don't know the best way to do this.

Example:

// String wich contains <a hrefs="#">#</a> tags 
$string = "This is a small <a href="#">text</a> to create a <a href="#">example</a>"; 

// output
Link 1: <a href="#">text</a>
Link 2: <a href="#">example</a>