file_put_contents

(PHP 5, PHP 7, PHP 8)

file_put_contents — Escreve dados em um arquivo

Descrição

file_put_contents(
    string $filename,
    mixed $data,
    int $flags = 0,
    ?resource $context = null
): int|false

Esta função é idêntica a chamar fopen(), fwrite() e fclose() sucessivamente para escrever dados em um arquivo.

Se o arquivo informado em filename não existir, o arquivo é criado. Do contrário, o arquivo existente é sobrescrito, a não ser que a opção FILE_APPEND seja definida.

Parâmetros

filename

O caminho para o arquivo onde os dados serão escritos.

data

Os dados a serem escritos. Pode ser uma string, um array ou um recurso stream.

Se data for um recurso stream, o buffer restante desse fluxo será copiado para o arquivo especificado, semelhante à utilização de stream_copy_to_stream().

Você também pode especificar o parâmetro data como um array unidimensional. Isso é equivalente a file_put_contents($filename, implode('', $array)).

flags

O valor de flags pode ser qualquer combinação das seguintes opções, adicionadas com o operador binário OR (|).

**Opções disponíveis**
Opção	Descrição
`FILE_USE_INCLUDE_PATH`	Procura o arquivo `filename` nos diretórios de include. Consulte include_path para mais informações.
`FILE_APPEND`	Se o arquivo `filename` já existir, acrescenta os dados ao arquivo ao invés de sobrescrevê-lo.
`LOCK_EX`	Adquire uma trava exclusiva no arquivo ao prosseguir para a escrita. Em outras palavras, uma chamada a flock() acontece entre a chamada fopen() e a chamada fwrite(). Isso não é idêntico à uma chamada fopen() com modo "x".

context

Um recurso de contexto válido criado com stream_context_create().

Valor Retornado

Esta função retorna a quantidade de bytes que foi escrita no arquivo ou false em caso de falha.

Aviso

Esta função pode retornar o valor booleano false, mas também pode retornar um valor não booleano que pode ser avaliado como false. Leia a seção sobre Booleanos para mais informações. Use o operador === para testar o valor retornado por esta função.

Exemplos

Exemplo #1 Exemplo de uso simples

<?php
$file = 'people.txt';
// Abre o arquivo para obter o conteúdo existente
$current = file_get_contents($file);
// Acrescenta a nova pessoa no arquivo
$current .= "John Smith\n";
// Escreve o conteúdo de volta no arquivo
file_put_contents($file, $current);
?>

Exemplo #2 Usando flags

<?php
$file = 'people.txt';
// A nova pessoa para adicionar no arquivo
$person = "John Smith\n";
// Escreve o conteúdo no arquivo,
// usando a flag FILE_APPEND para acrescentar o conteúdo no fim do arquivo
// e a flag LOCK_EX para evitar que outra pessoa escreva no arquivo ao mesmo tempo
file_put_contents($file, $person, FILE_APPEND | LOCK_EX);
?>

Notas

Nota: Esta função é compatível com dados binários.

Dica

Uma URL pode ser usada como um nome de arquivo com esta função se os wrappers fopen estiverem habilitados. Consulte a função fopen() para mais detalhes sobre como especificar o nome do arquivo. Consulte os Protocolos e Wrappers suportados para obter links para informações sobre as capacidades de cada wrapper, notas de uso e informações sobre quaisquer variáveis predefinidas que eles possam fornecer.

Veja Também

fopen() - Abre um arquivo ou URL
fwrite() - Escrita binary-safe em arquivos
file_get_contents() - Lê todo o conteúdo de um arquivo para uma string
stream_context_create() - Cria um contexto de fluxo

add a note

User Contributed Notes 19 notes

down

130

TrentTompkins at gmail dot com ¶

16 years ago


File put contents fails if you try to put a file in a directory that doesn't exist. This creates the directory.

<?php
    function file_force_contents($dir, $contents){
        $parts = explode('/', $dir);
        $file = array_pop($parts);
        $dir = '';
        foreach($parts as $part)
            if(!is_dir($dir .= "/$part")) mkdir($dir);
        file_put_contents("$dir/$file", $contents);
    }
?>

down

justin dot carlson at gmail dot com ¶

13 years ago


It should be obvious that this should only be used if you're making one write, if you are writing multiple times to the same file you should handle it yourself with fopen and fwrite, the fclose when you are done writing.

Benchmark below:

file_put_contents() for 1,000,000 writes - average of 3 benchmarks:

 real 0m3.932s
 user 0m2.487s
 sys 0m1.437s

fopen() fwrite() for 1,000,000 writes, fclose() -  average of 3 benchmarks:

 real 0m2.265s
 user 0m1.819s
 sys 0m0.445s

down

Anonymous ¶

2 years ago


A more simplified version of the method that creates subdirectories:

function path_put_contents($filePath, $contents, $flags = 0) {

    if (! is_dir($dir = implode('/', explode('/', $filePath, -1))))
        mkdir($dir, 0777, true);
    file_put_contents($filePath, $contents, $flags);
}

down

maksam07 at gmail dot com ¶

5 years ago


A slightly simplified version of the method: http://php.net/manual/ru/function.file-put-contents.php#84180

<?php 
function file_force_contents( $fullPath, $contents, $flags = 0 ){
    $parts = explode( '/', $fullPath );
    array_pop( $parts );
    $dir = implode( '/', $parts );
    
    if( !is_dir( $dir ) )
        mkdir( $dir, 0777, true );
    
    file_put_contents( $fullPath, $contents, $flags );
}

file_force_contents( ROOT.'/newpath/file.txt', 'message', LOCK_EX );
?>

down

deqode at felosity dot nl ¶

14 years ago


Please note that when saving using an FTP host, an additional stream context must be passed through telling PHP to overwrite the file.



<?php

 /* set the FTP hostname */

 $user = "test";

 $pass = "myFTP";

 $host = "example.com";

 $file = "test.txt";

 $hostname = $user . ":" . $pass . "@" . $host . "/" . $file;



 /* the file content */

 $content = "this is just a test.";

 

 /* create a stream context telling PHP to overwrite the file */

 $options = array('ftp' => array('overwrite' => true));

 $stream = stream_context_create($options);

 

 /* and finally, put the contents */

 file_put_contents($hostname, $content, 0, $stream);

?>

down

chris at ocportal dot com ¶

11 years ago


It's important to understand that LOCK_EX will not prevent reading the file unless you also explicitly acquire a read lock (shared locked) with the PHP 'flock' function.

i.e. in concurrent scenarios file_get_contents may return empty if you don't wrap it like this:

<?php
$myfile=fopen('test.txt','rt');
flock($myfile,LOCK_SH);
$read=file_get_contents('test.txt');
fclose($myfile);
?>

If you have code that does a file_get_contents on a file, changes the string, then re-saves using file_put_contents, you better be sure to do this correctly or your file will randomly wipe itself out.

down

egingell at sisna dot com ¶

18 years ago


In reply to the previous note:

If you want to emulate this function in PHP4, you need to return the bytes written as well as support for arrays, flags.

I can only figure out the FILE_APPEND flag and array support. If I could figure out "resource context" and the other flags, I would include those too.

<?

define('FILE_APPEND', 1);
function file_put_contents($n, $d, $flag = false) {
    $mode = ($flag == FILE_APPEND || strtoupper($flag) == 'FILE_APPEND') ? 'a' : 'w';
    $f = @fopen($n, $mode);
    if ($f === false) {
        return 0;
    } else {
        if (is_array($d)) $d = implode($d);
        $bytes_written = fwrite($f, $d);
        fclose($f);
        return $bytes_written;
    }
}

?>

down

aabaev arroba gmail coma com ¶

8 years ago


I suggest to expand file_force_contents() function of TrentTompkins at gmail dot com by adding verification if patch is like: "../foo/bar/file"

if (strpos($dir, "../") === 0)
    $dir = str_replace("..", substr(__DIR__, 0, strrpos(__DIR__, "/")), $dir);

down

Anonymous ¶

7 years ago


Make sure not to corrupt anything in case of failure.

<?php

function file_put_contents_atomically($filename, $data, $flags = 0, $context = null) {
    if (file_put_contents($filename."~", $data, $flags, $context) === strlen($contents)) {
        return rename($filename."~",$filename,$context);
    }

    @unlink($filename."~", $context);
    return FALSE;
}

?>

down

aidan at php dot net ¶

20 years ago


This functionality is now implemented in the PEAR package PHP_Compat.

More information about using this function without upgrading your version of PHP can be found on the below link:

http://pear.php.net/package/PHP_Compat

down

vaneatona at gmail dot com ¶

7 years ago


I'm updating a function that was posted, as it would fail if there was no directory. It also returns the final value so you can determine if the actual file was written.

    public static function file_force_contents($dir, $contents){
        $parts = explode('/', $dir);
        $file = array_pop($parts);
        $dir = '';

        foreach($parts as $part) {
            if (! is_dir($dir .= "{$part}/")) mkdir($dir);
        }

        return file_put_contents("{$dir}{$file}", $contents);
    }

down

ravianshmsr08 at gmail dot com ¶

14 years ago


To upload file from your localhost to any FTP server.

pease note 'ftp_chdir' has been used instead of putting direct remote file path....in ftp_put ...remoth file should be only file name



<?php

$host = '*****';

$usr = '*****';

$pwd = '**********';         

$local_file = './orderXML/order200.xml';

$ftp_path = 'order200.xml';

$conn_id = ftp_connect($host, 21) or die ("Cannot connect to host");      

ftp_pasv($resource, true);

ftp_login($conn_id, $usr, $pwd) or die("Cannot login");

// perform file upload

ftp_chdir($conn_id, '/public_html/abc/'); 

$upload = ftp_put($conn_id, $ftp_path, $local_file, FTP_ASCII);

if($upload) { $ftpsucc=1; } else { $ftpsucc=0; }

// check upload status:

print (!$upload) ? 'Cannot upload' : 'Upload complete';

print "\n";

// close the FTP stream

ftp_close($conn_id);

?>

down

curda222 at gmail dot com ¶

11 months ago


An improved and enraptured code from TrentTompkins at gmail dot com  

Note: Added error response 
Note: Added directory detection
Note: Added root detection
Note: Added permissions when creating folder

function file_force_contents($dir, $contents, $flags = 0){
    if (strpos($dir, "../") === 0){
        $dir = str_replace("..", substr(__DIR__, 0, strrpos(__DIR__, "/")), $dir);
    }
    $parts = explode('/', $dir);
    if(is_array($parts)){
        $file = array_pop($parts);
        $dir = '';
        foreach($parts as $part)
            if(!is_dir($dir .= "/$part")){
                mkdir($dir, 0777, true);
            }
            if(file_put_contents("$dir/$file", $contents, $flags) === false ){
            return false;
        }
    }else{
        if(file_put_contents("$dir", $contents, $flags) === false ){
            return false;
        } 
    }
}

-Oliver Leuyim Angel

down

gurjindersingh at SPAM dot hotmail dot com ¶

10 years ago


File put contents fails if you try to put a file in a directory that doesn't exist. This function creates the directory.
 
i have updated code of "TrentTompkins at gmail dot com". thanks
<?php
/**
 * @param string $filename <p>file name including folder. 
 * example :: /path/to/file/filename.ext or filename.ext</p>
 * @param string $data <p> The data to write.
 * </p>
 * @param int $flags same flags used for file_put_contents.
 * more info: http://php.net/manual/en/function.file-put-contents.php
 * @return bool <b>TRUE</b> file created succesfully <br> <b>FALSE</b> failed to create file.
 */
function file_force_contents($filename, $data, $flags = 0){
    if(!is_dir(dirname($filename)))
        mkdir(dirname($filename).'/', 0777, TRUE);
    return file_put_contents($filename, $data,$flags);
}
// usage

file_force_contents('test1.txt','test1 content');  // test1.txt created

file_force_contents('test2/test2.txt','test2 content'); 
// test2/test2.txt created "test2" folder.  

file_force_contents('~/test3/test3.txt','test3 content'); 
// /path/to/user/directory/test3/test3.txt created "test3" folder in user directory (check on linux "ll ~/ | grep test3").  
?>

down

Brandon Lockaby ¶

13 years ago


Calling file_put_contents within a destructor will cause the file to be written in SERVER_ROOT...

down

vahkos at mail dot ru ¶

12 years ago


file_put_contents does not issue an error message if file name is incorrect(for example has improper symbols on the end of it /n,/t)

that is why use trim() for file name.

$name=trim($name);

file_put_contents($name,$content);

down

error at example dot com ¶

14 years ago


It's worth noting that you must make sure to use the correct path when working with this function. I was using it to help with logging in an error handler and sometimes it would work - while other times it wouldn't. In the end it was because sometimes it was called from different paths resulting in a failure to write to the log file.

__DIR__ is your friend.

down

John Galt ¶

15 years ago


I use file_put_contents() as a method of very simple hit counters. These are two different examples of extremely simple hit counters, put on one line of code, each.

Keep in mind that they're not all that efficient. You must have a file called counter.txt with the initial value of 0.

For a text hit counter:
<?php
 $counter = file_get_contents("counter.txt"); $counter++; file_put_contents("counter.txt", $counter); echo $counter;
?>

Or a graphic hit counter:
<?php
 $counter = file_get_contents("counter.txt"); $counter++; file_put_contents("counter.txt", $counter); for($i = 0; $i < strlen($counter); $i++) echo "<img src=\"counter/".substr($counter, $i, 1).".gif\" alt=\"".substr($counter, $i, 1)."\" />";
?>

down

wjsams at gmail dot com ¶

15 years ago


file_put_contents() strips the last line ending

If you really want an extra line ending at the end of a file when writing with file_put_contents(), you must append an extra PHP_EOL to the end of the line as follows.

<?php
$a_str = array("these","are","new","lines");
$contents = implode(PHP_EOL, $a_str);
$contents .= PHP_EOL . PHP_EOL;
file_put_contents("newfile.txt", $contents);
print("|$contents|");
?>

You can see that when you print $contents you get two extra line endings, but if you view the file newfile.txt, you only get one.

add a note