PHP searching for a string in multiple files within a directory

Question

Im only a begginer in PHP so Im really sorry if it is just a stupid question.I have a directory full of .txt files and I have written a code to find a specific string inside those files and echo the whole line :

<?php
$search = $_POST['search'];
$dir = 'C:\xampp\htdocs\myfiles\dbl';
$files = scandir($dir,1);
foreach ($files as $lines){
    foreach($lines as $line)
    {
    if(strpos($line, $search) !== false)
    echo $line;
    }
}
?>

However,I keep getting this error : Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\myfiles\search.php on line 19

If you need speed on many large files then have a look at running grep from PHP using shell_exec. — Drakes
– Drakes, Commented Jul 25, 2016 at 13:56

D.Samchuk · Accepted Answer · 2016-07-06 17:42:41Z

2

This error caused by fact that you actually didn't open file within 1-st loop. You must open each file before looping throw lines. You can do it with two ways:

1) Using file_get_contents() function

2) Using some functions for work with files (fopen(), fclose(), etc)

Go here

answered Jul 6, 2016 at 17:42

D.Samchuk

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Poorvi Gandhi · Accepted Answer · 2016-07-06 18:05:14Z

2

$search = 'test';
$dir = 'C:\xampp5.6\htdocs';
$files = scandir($dir,1);
foreach ($files as $lines){
    if(strlen($lines) > 3 && strpos($lines, '.txt') !== false){
        $readfile = fopen('C:\xampp5.6\htdocs/'.$lines, 'r');

        while(!feof($readfile)) {
            $contents = fgets($readfile);
            if(strpos($contents, $search) !== false)
                echo $lines.'<br>';
        }
        fclose($readfile);
    }
}

answered Jul 6, 2016 at 18:05

Poorvi Gandhi

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2 Comments

Gytis Gecevicius Over a year ago

This worked perfectly,thanks! But how can I make it case insensitive? strtolower is very slow because my files are large.

Poorvi Gandhi Over a year ago

you can user stripos($contents, $search) too.

Ikelie Cyril · Accepted Answer · 2016-07-06 17:45:34Z

0

Use fopen() to read each file and then search for the string

answered Jul 6, 2016 at 17:45

Ikelie Cyril

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