PHP file_put_contents function _php Tutorial

PHP file_put_contents functions

File_put_contents
(in PHP 5)

File_put_contents-Write a string to a file

Describe
International file_put_contents (string $ file name, mixed $ data [abstract $ flag = 0 [, resource $ background]])
This feature is identical to the requirement fopen () function, fwrite () and fclose () to write data to a file successively.

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

Parameters

Filename
The file path where the data is written.

Data
This data is a letter to us. Can be a string, an array, or a stream resource (explained above).

If the data flow 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 data parameters as a single layer array. This equates to file_put_contents ($ file name, Burst (', $ array)).

Flag
The value of the national flag can be arbitrarily combined with the following flags (with some restrictions), added binary or (| ) operator.


Flag can be hoisted description
File_use_include_path The search file name contains a directory. See Include_path for more information.
File_append if the archive filename already exists, append the data to the file instead of overwriting it.
LOCK_EX obtains an exclusive locked file and begins writing at the same time.
File_text the text mode in which the data is written. If Unicode semantics is enabled, the default character encoding is UTF-8. You can specify a different encoding, create a custom range, or use stream_default_encoding () to change the default. This flag cannot be used for file_binary. This flag is only available from PHP 6.
The file_binary data is written in binary mode. This is the default setting and cannot be used for file_text. This flag is only available from PHP 6.


Background
Establish Stream_context_create () within the valid range of resources.


return value
The number of bytes returned by the function is a failure to write to the file, or false.

Instance

For example # 1 use a 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);
?>

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