How to increment the txt file name that will be created in php?

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If it is possible, how to increment the txt filename in php? I am working with php that I know very little, I need to increment the name of a txt file, to create a new file json.txt whenever I send a file to the server. Does anyone know how to do this? I’m having to increment at hand, I’m on json46.txt.

$file = fopen('JSON46.txt', 'w'); // cria o arquivo json.txt
fwrite($file, $_POST['json']."\r\n\r\n\r\n");
php
  • 2

    You want to change the name of the same file?

  • I want to generate files incrementing the number in the name for example Json1.txt after Json2.txt always incrementing the number.

2 answers

1

It would be something like this:

//Primeiro você precisa de uma variável que conte.
$jsonIncremento = 0;

//aqui você concatena com o nome do arquivo.
$file = fopen('JSON' .$jsonIncremento. '.txt', 'w'); // cria o arquivo json.txt
fwrite($file, $_POST['json']."\r\n\r\n\r\n");

//depois a cada arquivo criado é so ir incrementando ela.
$jsonIncremento++;

1

If you don’t have a memory control of which number you need, I thought of the following solution:

  • Read all files from a directory.
  • I make a regex to get all numbers in the title.
  • I look for the greatest number among them
  • Return the next increment you need


$seuDiretorio = '/tmp'; /* exemplo */
$arqs = scandir($seuDiretorio);

$maior = 0;
foreach ($arqs as $arq) {
    $numeroArq = preg_replace( '/[^0-9]/', '', basename($arq));

    if ($numeroArq > $maior) {
        $maior = $numeroArq;
    }
}

echo 'Próximo Numero é '. ($maior + 1);

This way to create the next is just to do:

$file = fopen('JSON'.($maior+1).'.txt', 'w');

With this code you need to be aware that in the directory can only have the files you are saving with increment.

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