PHP replace string with file_get_contents

Question

I'm trying to replace a string in a file, so far so good. The file is a htm file in html format bt this shouldn't be a problem.

My script looks like this:

$file = './test.htm';
$content = file_get_contents($file);
$str = str_replace('Signature','Test',$content);
file_put_contents('./test2.htm', $str);

The problem is str_replace doesn't replace the string "Signature", the output file has exactly the same content as my input file.

If I use the file content without file_get_contetnts, just while defining the string as a variable, my script works like a charme.

@Raptor ...because? Genuine enquiry here, especially in so far as it would relate to this case. — ADyson
– ADyson, Commented Mar 1, 2021 at 9:12
@Raptor and why would such fine-grained control over the file-reading process be necessary in this case? Did I miss something? We're not dealing with raw binary data, or streaming here. — ADyson
– ADyson, Commented Mar 1, 2021 at 23:23

Debuqer · Accepted Answer · 2021-03-01 10:23:34Z

2

Your code looks fine.

Make sure you have actually 'Signature' in your code.
Make sure you don't use any non-printable unicode characters with Signature.
Append 'Signature' at the end of your test.htm and see if your code works.

Edited:

Make sure your file use a valid and supported encoding( like UTF-8 )

edited Mar 1, 2021 at 10:23

answered Mar 1, 2021 at 9:25

Debuqer

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3 Comments

Qhiliqq Over a year ago

1 and 2 is checked, as it is working with the whole file content as a variable. 3 doesn't work. I found out that if I create a new file and copy the whole content to that new file, the new file is 50% smaller and the replace work?!?

Debuqer Over a year ago

what is the encoding of your test.htm? utf8 worked fine to me.

Qhiliqq Over a year ago

Thats it @MB-abb ! The file is UCS-2 LE BOM

Qhiliqq · Accepted Answer · 2021-03-01 10:23:51Z

2

With help from @MB-abb I found out that the encoding is UCS-2 LE BOM.

The added line in my script is now:

$str = mb_convert_encoding($str, "UTF-8", "UCS-2LE");

Which changes UCS-2LE to UTF-8. Now str_replace works like a charme.

Thanks!

answered Mar 1, 2021 at 10:23

Qhiliqq

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