php file_put_contents function_PHP tutorial

php file_put_contents function ​

file_put_contents
(in PHP 5)

file_put_contents - writes a string to a file

Description
int file_put_contents (string $filename, mixed$data[summary$flag=0[, resources$background]])
This function is identical to the requirements of fopen(), fwrite(), and fclose() which successively write data to a file.

If the file does not exist, the file is created. Otherwise, the existing file is overwritten unless the FILE_APPEND flag is set.

Parameters

File name
File path where to write the data.

Data
Write to us about this data. Can be a string, array or stream resource (explained above).

If the data stream is a resource, the remaining buffer of the stream will be copied to the specified file. This is similar to using stream_copy_to_stream().

You can also specify the data parameter as a single level array. This is equivalent to file_put_contents($filename, explode('', $array)).

Flag
Flag values ​​can be any combination of the following flags (with some restrictions), added by the binary or ( | ) operator.


Description of flags that can be flown
FILE_USE_INCLUDE_PATH searches for directories contained in file names. See include_path for more information.
FILE_APPEND If the archive filename already exists, append data to the file instead of overwriting it.
LOCK_EX obtains an exclusive lock on the file and begins writing.
FILE_TEXT text mode for data writing. If Unicode semantics are enabled, the default character encoding is UTF-8. You can specify a different encoding, establish a custom range or use stream_default_encoding() to change the default. This flag cannot be used with FILE_BINARY. This flag only works since PHP 6.
FILE_BINARY data will be written in binary mode. This is the default setting and cannot be used with FILE_TEXT. This flag only works since PHP 6.


Background
Establish stream_context_create() within the valid scope of the resource.


Return value
This function returns the number of bytes written to the file, or FALSE on failure.

Example

Example #1 using simple example

$file = 'people.txt';
// Open the file to get existing content
$current = file_get_contents($file);
//Append a new person to the file
$current .= "John Smithn";
// Write the contents back to the file
file_put_contents($file, $current);
?>

$file = 'people.txt';
// The new person to add to the file
$person = "John Smithn";
// Write the contents to the file,
// using the FILE_APPEND flag to append the content to the end of the file
// and the LOCK_EX flag to prevent anyone else writing to the file at the same time
file_put_contents($file, $person, FILE_APPEND | LOCK_EX);
?>