title: Change color of readfile text output
body: <p>I have a very simple php script, of which is made to read the content of a file and then print it out on the site, using the method "readfile();" Here below you can see my code.</p>
  
  <pre><code>&lt;?php
  $readThisFile = './myFile.txt';
  
  readfile($readThisFile);
  ?&gt;
  </code></pre>
  
  <p>Now my question is whether it is possible to change the color of the text outcome, of which is visible on the website page. To give an example, once the php method has run and read my file and it outputs "hello world" on the site, because that is whats inside. Then the output is in black like any regular text, I was wondering whether it is possible to change that outcome to white or alike so that it is "invisible" on a white page. </p>
  
  <p>I have seen it is possible to do this if the content which is on the site is "echoed" and not "read" like below here.</p>
  
  <pre><code>&lt;?php
  echo '&lt;span style="color:white; align:center;"&gt;Hello World!&lt;/span&gt;';
  ?&gt;
  </code></pre>
  
  <p>But if that is possible to do with "readfile();" as well, I am not completely sure how I would implement it.</p>