So far I've only been able to find out if a link exists in the file, but I do not know how to do the exchange. My code is this:
$nomeArquivo = $_POST['nomeArquivo'];
foreach ($arquivos as $a){
$aq = fopen($a,"r+");
while (!feof($aq)){
$le = fgets($aq);
if(preg_match("/arquivo.txt/",$le)){
//realizar troca
//salvar arquivo
}
}
fclose($aq);
}
To perform the substitution you can use str_replace or preg_replace .
In this case just change to:
<?php
//...
if(preg_match("/arquivo.txt/",$le)){
$conteudo = str_replace("arquivo.txt", "novo_arquivo.txt", $le);
// Alternativa: preg_replace("/\barquivo.txt\b/", "novo_arquivo.txt", $le);
// Substitui o arquivo.txt por novo_arquivo.txt
fwrite($aq, $conteudo);
// Escreve o conteúdo editado.
}
//..
?>
Ideal solution:
Quit fopen , it will be easier and you will not have as much performance loss.
<?php
//...
foreach ($arquivos as $caminho){
$conteudoArquivo = file_get_contents($caminho);
// Isso irá pegar todo o conteudo do arquivo
if(preg_match("/arquivo.txt/", $conteudoArquivo)){
// Se existir arquivo.txt
$conteudoEditado = str_replace("arquivo.txt", "novo_arquivo.txt", $conteudoArquivo);
// Novo $conteudoEditado terá a alteração
file_put_contents($caminho, $conteudoEditado);
// Salva as alterações
}
}
//..
?>
Important (function feof() ):
There are some cases where feof() can create an infinite loop, there are even examples in the PHP documentation, which can be accessed by clicking here .
It is not clear because depending on what needs to be done there are several ways to solve.
For example, if you just want to change a specific string on all links, you can use str_replace() and save with file_put_contents() . Nor would it have to open with fopen() and search with regex . But as I said, it depends on what really needs to be done.
Example, if you just want to replace one string with another within the contents of a file:
file_put_contents(str_replace('nome-antigo.txt', 'nome-novo.txt', file_get_contents($caminho_do_arquivo)));