PHP searching for a string in a file

Question

I'm looking for a function that counts the number of times a string occurs within a file, I tried using $count = preg_match_all("/String/", $file, $matches); but it returns Warning: preg_match_all() expects parameter 2 to be string, resource given. Is there any function that allows me to do this with a file, instead of a string, or is there any way to assign a file to a string (I assume the latter would be a lot slower)?

You need to pass a string value to the 2nd parameter. Perhaps you can do: file_get_contents($filename) for that argument. — user142162
– user142162, Commented May 23, 2011 at 23:16

Felix Kling · Accepted Answer · 2011-05-23 23:20:25Z

12

yes:

file_get_contents() — Reads entire file into a string

http://php.net/manual/en/function.file-get-contents.php

so for you it would be

$file = file_get_contents(PATH_TO_FILE);
$count = preg_match_all("/String/", $file, $matches);

I'm guessing you have used fopen instead by mistake?

edited May 23, 2011 at 23:20

Felix Kling

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answered May 23, 2011 at 23:17

user336242

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1 Comment

John Over a year ago

Yes, I've been using fopen, but file_get_contents is exactly what I needed. Thank you.

user680786 · Accepted Answer · 2011-05-23 23:19:17Z

9

$count = substr_count(file_get_contents($file), $string);

Manual:
substr_count
file_get_contents

answered May 23, 2011 at 23:19

user680786

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