Can't get ParseDown to parse contents of a file

Question

I am fairly new to PHP. I am trying to get my code to read the content of a Markdown file based on the content of GET attribute "pgid", and then output it. This:

print Parsedown::instance()->text("Testing *Markdown* with **Parsedown**")

results in the output

Testing Markdown with Parsedown

But this:

print (Parsedown::instance()->text(readfile("./".$_GET['pgid'].".md")));

with ?pgid=about and the content of about.md being Testing *Markdown* with **Parsedown**, the output is

Testing *Markdown* with **Parsedown** 39

I am unsure why I can get all of the parts to work separately, but not together.

Because `readfile` writes directly to the output buffer, instead of _returning_ the file content it has read. Replace it with `file_get_contents`. — CBroe, May 04 '20 at 10:56
@CBroe I've now changed it and that worked. Thanks very much! — pythonmegapixel, May 04 '20 at 11:01

score 1 · Accepted Answer · answered May 04 '20 at 10:58

1

PHP's readfile() does not return file contents, it outputs them.

What your code does, is basically this:

print readfile($filename); // The print() here is implied by readfile itself.
print (Parsedown::instance()->text(80));

Where 80 is the number of bytes read from the file.

Instead of readfile(), you'll probably want to use file_get_contents(), which does return the contents of the file.

answered May 04 '20 at 10:58

Duroth

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I understand now, thanks! I'm coming from python where read() returns the file contents. Thanks for your help. – pythonmegapixel May 04 '20 at 11:03

Can't get ParseDown to parse contents of a file

1 Answers1