Count specific lines in text file - php

Question

How to count specific lines in a text file depending on a particular variable in that line.
For example i need to count the lines of a text file only containing for instance $item1 or $item2 etc.

Answer 1

Sounds like you need something like what grep -c do in the shell, try something like this:
$item1 = 'match me';
$item2 = 'match me too';
// Thanks to #Baba for the suggestion:
$match_count = count(
preg_grep(
'/'.preg_quote($item1).'|'.preg_quote($item2).'/i',
file('somefile_input.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES)
)
);
// does the same without creating a second array with the matches
$match_count = array_reduce(
file('somefile_input.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES),
function($match_count, $line) use ($item1, $item2) {
return
preg_match('/'.preg_quote($item1).'|'.preg_quote($item2).'/i', $line) ?
$match_count + 1 : $match_count;
}
);
The above code sample uses the file() function to read the file into an array (splitted by lines), array_reduce() to iterate that array and preg_match() inside the iteration to see if a line matched (the /i at the end makes it case-insensitive).
You could use a foreach as well too.

Answer 2

This code reads file.php and counts only lines containing '$item1' or '$item2'. The check itself could be finetuned, since you have to add a new stristr() for every word you want to check.
<?php
$file = 'file.php';
$fp = fopen($file, 'r');
$size = filesize($file);
$content = fread($fp, $size);
$lines = preg_split('/\n/', $content);
$count = 0;
foreach($lines as $line) {
if(stristr($line, '$item1') || stristr($line, '$item2')) {
$count++;
}
}
echo $count;

Answer 3

Read your file line by line and use strpos to determine if a line contains a specific string/item.
$handle = fopen ("filename", "r");
$counter = 0;
while (!feof($handle))
{
$line = fgets($handle);
// or $item2, $item3, etc.
$pos = strpos($line, $item);
if ($pos !== false)
{
$counter++
}
}
fclose ($handle);