PHP Read TXT, delete lines, create new file

Question

I want to use PHP and xamp/wamp to do the following task on my computer without the need to upload/download:

I have dozens of TXT files on the computer, each TXT containing only 1 name per line, no strokes, dots, etc.

I want to do a search, for example, for all people with surname "Silva" in these dozens of files, so PHP would read all TXT files, move all names with "Silva" to silva.txt and save the 2 files.

So far they have explained the following: The stop is to take the files and pass in php by a foreach on each line, add in the database, but before add do a search if there is already the data in the new file, then save the 2 files.

Can someone give me a light on how to do this?

I confess that I do not understand almost anything of PHP and I am beating head p/ do this foreach in several files at the same time, create this BD, create a new file, move everything, see if it has repeated, put in alphabetical order and save all the files later.

It’s complicated to work....

Answer 1

$base = __DIR__.DIRECTORY_SEPARATOR; // Diretório onde estão os arquivos txt.
$files = glob($base.'*.txt'); // Pega todos os arquivos que terminam com .txt

$search = 'silva'; // a palavra que deseja buscar
$found = array();
$arr = array();
// Itera os arquivos encontrados
foreach ($files as $file) {

    // Lê cada arquivo em um array
    $arr = file($file);
    foreach ($arr as $k => $v) {
        // Se encontrar a palavra, guarda no array $found e remove do array que leu o arquivo.
        if (stripos($v, $search) !== false) {
            $found[] = trim($arr[$k]);
            unset($arr[$k]);
        }
    }
    // Salva os dados no arquivo, com os nomes removidos
    if (!empty($found)) {
        file_put_contents($file, implode('', $arr));
    }

}
// salva todos os nomes encontrados
if (!empty($found)) {
    file_put_contents($base.'silva.txt', implode(PHP_EOL, $found));
}

unset($found, $arr);