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# file_get_contents

(PHP 4 >= 4.3.0, PHP 5)

file_get_contents -- Reads entire file into a string

## Description

string file_get_contents ( string filename [, bool use_include_path [, resource context [, int offset [, int maxlen]]]] )

Identical to file(), except that file_get_contents() returns the file in a string, starting at the specified offset up to maxlen bytes. On failure, file_get_contents() will return `FALSE`.

file_get_contents() is the preferred way to read the contents of a file into a string. It will use memory mapping techniques if supported by your OS to enhance performance.

> 注: If you're opening a URI with special characters, such as spaces, you need to encode the URI with urlencode().

## ChangeLog

Version | Description
--- | ---
5.0.0 | Added the context support.
5.1.0 | Added the offset and maxlen parameters.

## Notes

> 注: 這個函數可安全的使用於二進位。

> 提示: 如果 fopen wrappers 已啟動，則可藉此函數把檔名當成URL使用。參考 fopen() 有更多關於如何指定檔名的細節和附錄 L支援URL協定的列表。

警告
When using SSL, Microsoft IIS will violate the protocol by closing the connection without sending a close_notify indicator. PHP will report this as "SSL: Fatal Protocol Error" when you reach the end of the data. To workaround this, you should lower your error_reporting level not to include warnings. PHP 4.3.7 and higher can detect buggy IIS server software when you open the stream using the https:// wrapper and will suppress the warning for you. If you are using fsockopen() to create an ssl:// socket, you are responsible for detecting and suppressing the warning yourself.

## 參考

file()
fgets()
fread()
readfile()
file_put_contents()

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