title: Regular expression for preg_split() by new line
body: <p>This is my file:</p>
  
  <pre><code>0.0 5.0 5.0 6.0 7.0 2.0 5.0 2.0 1.0 5.0 5.0 1.0 2.0 7.1 5.0
  5.0 0.0 5.0 5.0 5.0 2.0 5.0 1.0 5.0 6.0 6.0 6.0 6.0 1.0 7.1
  5.0 5.0 0.0 6.0 1.0 6.0 5.0 5.0 1.0 6.0 5.0 7.0 1.0 5.0 6.0
  6.0 5.0 6.0 0.0 5.0 2.0 1.0 6.0 5.0 6.0 2.0 1.0 2.0 1.0 5.0
  7.0 5.0 1.0 5.0 0.0 7.0 1.0 1.0 2.0 1.0 5.0 6.0 2.0 2.0 5.0
  2.0 2.0 6.0 2.0 7.0 0.0 5.0 5.0 6.0 5.0 2.0 5.0 1.0 2.0 5.0
  5.0 5.0 5.0 1.0 1.0 5.0 0.0 2.0 6.0 1.0 5.0 7.0 5.0 1.0 6.0
  7.0 1.0 5.0 1.0 2.0 2.0 1.0 5.0 6.0 5.0 2.0 6.0 7.0 0.0 5.0
  5.0 7.0 6.0 5.0 5.0 5.0 6.0 2.0 6.0 2.0 1.0 5.0 6.0 5.0 0.0
  </code></pre>
  
  <p>I would split it by \n and have returned in one array each row. How can I do the regular expression?</p>
  
  <pre><code>$rows = preg_split('$regular_expression', $content);
  </code></pre>
  
  <p>After I will extract all the rows, how can I extract each value separated by backspace?</p>
  
  <pre><code>$values_in_a_row = preg_split('$regular_expression', $a_row);
  </code></pre>
  
  <p>Here the text were I am trying to do it <a href="http://regexr.com?2v23c" rel="nofollow noreferrer">http://regexr.com?2v23c</a> .</p>