(PHP 5, PHP 7, PHP 8)
file_put_contents — 将数据写入文件
$filename,$data,$flags = 0,$context = null和依次调用 fopen()，fwrite() 以及 fclose() 功能一样。
如果 filename
不存在，将会创建文件。反之，存在的文件将会重写，除非设置
FILE_APPEND flag。
filename要被写入数据的文件名。
data要写入的数据。类型可以是 string，array 或者是 stream 资源（如上面所说的那样）。
如果 data
指定为 stream 资源，这里 stream
中所保存的缓存数据将被写入到指定文件中，这种用法就相似于使用
stream_copy_to_stream() 函数。
参数 data 可以是数组（但不能为多维数组），这就相当于
file_put_contents($filename, join('', $array))。
flags
flags 的值可以是
以下 flag 使用 OR (|) 运算符进行的组合。
| Flag | 描述 |
|---|---|
FILE_USE_INCLUDE_PATH
|
在 include 目录里搜索 filename。
更多信息可参见 include_path。
|
FILE_APPEND
|
如果文件 filename 已经存在，追加数据而不是覆盖。
|
LOCK_EX
|
在写入时获取文件独占锁。换句话说，在调用 fopen() 和 fwrite() 中间发生了 flock() 调用。这与调用带模式“x”的 fopen() 不同。 |
context一个 context 资源。
该函数将返回写入到文件内数据的字节数，失败时返回false
示例 #1 简单用法示例
<?php
$file = 'people.txt';
// 打开文件获取已经存在的内容
$current = file_get_contents($file);
// 追加新成员到文件
$current .= "John Smith\n";
// 将内容写回文件
file_put_contents($file, $current);
?>示例 #2 Using flags
<?php
$file = 'people.txt';
// The new person to add to the file
$person = "John Smith\n";
// Write the contents to the file,
// using the FILE_APPEND flag to append the content to the end of the file
// and the LOCK_EX flag to prevent anyone else writing to the file at the same time
file_put_contents($file, $person, FILE_APPEND | LOCK_EX);
?>注意: 此函数可安全用于二进制对象。
如已启用fopen 包装器，在此函数中， URL 可作为文件名。关于如何指定文件名详见 fopen()。各种 wapper 的不同功能请参见 支持的协议和封装协议，注意其用法及其可提供的预定义变量。
File put contents fails if you try to put a file in a directory that doesn't exist. This creates the directory.
<?php
function file_force_contents($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);
}
?>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 0m0.445sA 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 );
?>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.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, $stream);
?>Make sure not to corrupt anything in case of failure.
<?php
function file_put_contents_atomically($filename, $data, $flags = 0, $context = null) {
if (file_put_contents($filename."~", $data, $flags, $context) === strlen($contents)) {
return rename($filename."~",$filename,$context);
}
@unlink($filename."~", $context);
return FALSE;
}
?>This functionality is now implemented in the PEAR package PHP_Compat.
More information about using this function without upgrading your version of PHP can be found on the below link:
http://pear.php.net/package/PHP_CompatIn reply to the previous note:
If you want to emulate this function in PHP4, you need to return the bytes written as well as support for arrays, flags.
I can only figure out the FILE_APPEND flag and array support. If I could figure out "resource context" and the other flags, I would include those too.
<?
define('FILE_APPEND', 1);
function file_put_contents($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 $bytes_written;
}
}
?>I'm updating a function that was posted, as it would fail if there was no directory. It also returns the final value so you can determine if the actual file was written.
public static function file_force_contents($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}", $contents);
}A more simplified version of the method that creates subdirectories:
function path_put_contents($filePath, $contents, $flags = 0) {
if (! is_dir($dir = implode('/', explode('/', $filePath, -1))))
mkdir($dir, 0777, true);
file_put_contents($filePath, $contents, $flags);
}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($conn_id);
?>Calling file_put_contents within a destructor will cause the file to be written in SERVER_ROOT...An improved and enraptured code from TrentTompkins at gmail dot com
Note: Added error response
Note: Added directory detection
Note: Added root detection
Note: Added permissions when creating folder
function file_force_contents($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 AngelIt'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.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, $i, 1)."\" />";
?>I suggest to expand file_force_contents() function of TrentTompkins at gmail dot com by adding verification if patch is like: "../foo/bar/file"
if (strpos($dir, "../") === 0)
$dir = str_replace("..", substr(__DIR__, 0, strrpos(__DIR__, "/")), $dir);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").
?>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.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);