Multiple search word matching using strpos - php

Question

I wonder if anyone can help with a little problem I can't seem to fix - my
head is going round in circles at the moment...
Ok I have a .txt file with numerous lines of info - I am trying to match keywords
with those lines and display a certain number of the matching lines.
I put together this bit of script and whilst it works it only matches a line if the
words are in the same order as the search words.
At the moment as an example:
Search words:
red hat
Lines in .txt file:
this is my red hat
my hat is red
this hat is green
this is a red scarf
your red hat is nice
As the script is at the moment it will match and display lines 1, 5
However I would like it to match and display lines 1, 2, 5
Any order but all words must be present to match.
I have looked through loads of postings here and elsewhere and I understand that
what is needed is to explode the string and then search for each word in a loop but
I cannot get that to work, despite trying a few different ways as it just returns the
same line numerous times.
Any help would be appreciated before I lose what hair I have left :-)
Here is the code I have working at present - the search variable is already
set:
<?php
rawurldecode($search);
$search = preg_replace('/[^a-z0-9\s]|\n|\r/',' ',$search);
$search = strtolower($search);
$search = trim($search);
$lines = file('mytextfile.txt') or die("Can't open file");
shuffle($lines);
$counter = 0;
// Store true when the text is found
$found = false;
foreach($lines as $line)
{
if(strpos($line, $search) !== false AND $counter <= 4)
{
$found = true;
$line = '<img src=""> '.$line.'<br>';
echo $line;
$counter = $counter + 1;
}
}
// If the text was not found, show a message
if(!$found)
{
echo $noresultsmessage;
}
?>
Thanks in advance for any help - still learning :-)

Answer 1

Here's my code:
$searchTerms = explode(' ', $search);
$searchCount = count($searchTerms);
foreach($lines as $line)
{
if ($counter <= 4) {
$matchCount = 0;
foreach ($searchTerms as $searchWord) {
if (strpos($line, $searchWord) !== false ) {
$matchCount +=1;
} else {
//break out of foreach as no need to check the rest of the words if one wasn't found
continue;
}
}
if ($matchCount == $searchCount) {
$found = true;
$line = '<img src=""> '.$line.'<br>';
echo $line;
$counter = $counter + 1;
}
}
}