array_reverse() expects parameter 1 to be array, string given in

Question

I am grabbing a .txt file and trying to reverse it, but I get this error when I try to, I don't understand it. Help please?

array_reverse() expects parameter 1 to be array, string given in ......

Here is the code:

$dirCont = file_get_contents($dir, NULL, NULL, $sPoint, 10240000);
$invertedLines = array_reverse($dirCont);

echo $invertedLines;

Suroot · Accepted Answer · 2011-06-15 03:52:09Z

2

A string is not an array? Even if it were (as in C strings) it would not work as you expected. You'll need to split the file on line breaks (if you're trying to reverse to get the end of the file first).

$invertedLines = array_reverse(preg_split("/\n/", $dirCont));

edited Jun 15, 2011 at 3:52

answered Jun 15, 2011 at 3:33

Suroot

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6 Comments

user456814 Over a year ago

For clarification, what Suroot is trying to say is that the file_get_contents function you're using returns a string, not an array, so you're feeding array_reverse a string, which of course isn't going to work, us3.php.net/file_get_contents

alex Over a year ago

Thank you Suroot, however I am recieving another error now, and the same array_reverse error aswell: Warning: preg_split() [function.preg-split]: Unknown modifier 'v' in

Suroot Over a year ago

Can you paste the new code that you're using? Seems like you're trying to pass preg_split some flags that it's not happy with. Also, post all of the errors that you are seeing. Probably be best to edit the original post with the new information.

alex Over a year ago

$dirCont = file_get_contents($dir, NULL, NULL, $sPoint, 10240000); $invertedLines = array_reverse(preg_split($dirCont, "\n")); Two errors are: Warning: preg_split() [function.preg-split]: Unknown modifier 'v' in and Warning: array_reverse() expects parameter 1 to be array, boolean given

Suroot Over a year ago

Ha, my fault; not having a good day today; need to reverse the parameters in preg_split(). Will update, sorry for the confusion. Also need to include // around the pattern, hence /\n/

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Nirmal Khadka · Accepted Answer · 2018-05-11 10:00:59Z

1

I think you need to pass the value on an array.

array_reverse(array($dircont));

This is working fine for me.

answered May 11, 2018 at 10:00

Nirmal Khadka

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