line brek error with search system in php - php

Question

I am developing a system that searches for words that the user types in php files, using PHP without MySQL but I am having a problem. The system works really well when there is not a line break in the file. For example, if I search for the word "good" in a file that contains the text "good morning" works fine, but if I search for "good" in a file that contains the text "goodmorning" (with a line break) it won't list the file as a result. Here is my code:
index.php
<form action="busca.php" method="get">
<input type="text" name="s"><br>
<input type="submit">
</form>
busca.php
<?php
$pesq = (isset($_GET['s'])) ? trim($_GET['s']) : '';
if (empty($pesq)) {
echo 'Type something.';
} else {
$index = "index.php";
$busca = glob("posts/content/*.php", GLOB_BRACE);
$lendo = "";
$conteudo = "";
foreach ($busca as $item) {
if ($item !== $index) {
$abrir = fopen($item, "r");
while (!feof($abrir)) {
$lendo = fgets($abrir);
$conteudo .= $lendo;
$lendo .= strip_tags($lendo);
}
if (stristr($lendo, $pesq) == true) {
$dados = str_replace(".php", "", $item);
$dados = basename($dados);
$result[] = "$dados";
unset($dados);
}
fclose($abrir);
}
}
if (isset($result) && count($result) > 0) {
$result = array_unique($result);
echo '<ul>';
foreach ($result as $link) {
echo "<li>$link</li>";
}
echo '</ul>';
} else {
echo 'No results';
}
}
?>

Answer 1

Your usage of stristr is incorrect.
Compare it with false like this:
if (stristr($lendo, $pesq) !== false) {
If a string is located — the function returns the substring. Which can be casted as boolean true or false, you never know. If it doesn't find it — it returns false — the only correct value you should compare it to.
Even better to use strpos for this.
My variant:
foreach ($busca as $item) {
if ($item !== $index) {
$lendo = file_get_contents($item);
$lendo = strip_tags($lendo);
if (strpos($lendo, $pesq) !== false) {
$dados = str_replace(".php", "", basename($item));
$result[] = "$dados";
}
}
}
To fix the linebreaks - try to get rid of them
Like this:
$lendo = file_get_contents($item);
$lendo = strip_tags($lendo);
$lendo = str_replace(["\r","\n"], ' ', $lendo);