PHP Limit number of results per page - php

Question

I have a php search code that returns the results in the page. What I wanna do is limit the number of results per page to 10, and echo a link for more results.
My code is:
$dir = 'www/posts';
$exclude = array('.','..','.htaccess');
$q = (isset($_GET['q']))? strtolower($_GET['q']) : '';
if (!empty($q)) {
$res = opendir($dir);
while(false!== ($file = readdir($res))) {
if(strpos(strtolower($file),$q)!== false &&!in_array($file,$exclude)) {
$last_dot_index = strrpos($file, ".");
$withoutExt = substr($file, 0, $last_dot_index);
$fpath = 'posts/'.$file;
if (file_exists($fpath)) {
echo "<a href='/search.php?post=$withoutExt'>$withoutExt</a>" . " on " . date ("d F Y ", filemtime($fpath)) ;
echo "<br>";
}
}
}
closedir($res);
}
else {
echo "";
}
I tried the $q->limit(10); but it doesnt work. Please help me write a working code.

Answer 1

<?php
$dir = 'www/posts';
$exclude = array(
'.',
'..',
'.htaccess'
);
$q = (isset($_GET['q'])) ? strtolower($_GET['q']) : '';
$results=[];
if (! empty($q)) {
$res = opendir($dir);
while (false !== ($file = readdir($res))) {
if (strpos(strtolower($file), $q) !== false && ! in_array($file, $exclude)) {
$last_dot_index = strrpos($file, ".");
$withoutExt = substr($file, 0, $last_dot_index);
$fpath = 'posts/' . $file;
if (file_exists($fpath)) {
$results[]="<a href='/search.php?post=$withoutExt'>$withoutExt</a>" . " on " . date("d F Y ", filemtime($fpath));
}
}
}
closedir($res);
}
foreach ($results as $result) {
echo $result;
echo "<br>";
}
if (count($results) > 10 ) {
echo 'results is more than 10, but only 10 results is shown';
}

Answer 2

Here is a completely untested suggestion... I am happy to have a bit of back and forth to iron it out.
if(!empty($_GET['q'])){
// perform some logical validation/sanitization on `$_GET['q']` for stability/security
$path = '../posts'; // this relative path may need some adjusting
$files=glob("$path/*.txt"); // collect all .txt files from the directory
var_export($files);
$filtered=preg_grep('~.*'.preg_quote($q,'/').'.*\.txt$~i',$files); // case-insensitive filename search
var_export($filtered);
if(!empty($filtered)){
$batches=array_chunk($filtered,10); // store in groups of 10
var_export($batches); // check the data
if(!isset($_GET['page'],$batches[--$page])){ // a page has been submitted and that page exists in the batches array (subtract one to sync the page with the index)
$page=0;
}
$leftovers=array_keys(array_diff_key($batches,[$page=>'']));
foreach($batches[$page] as $filename){
$withoutExt=substr($filename,0,strrpos($filename,"."));
$fpath="posts/$filename";
echo "<div><a href='/search.php?post=$withoutExt'>$withoutExt</a> on ",date("d F Y",filemtime($fpath)),"</div>";
}
// here you can list the other pages available from this search
if($leftovers){
echo "Additional pages:";
foreach($leftovers as $offset){
echo " <a href='/search.php?q={$_GET['q']}&page=",++$offset,"'>$offset</a>";
}
}
}
}else {
echo "No Search Terms found";
}