file_get_contents() 将文件读取到字符串中。
此函数是将文件内容读入字符串的首选方法。如果服务器支持,它将使用内存映射技术来提高性能。
file_get_contents(
path,
include_path,
context,
start,
max_length)
Parameter | Description |
---|---|
path | Required. Specifies the path to the file to read |
include_path | Optional. Set this parameter to '1' if you want to search for the file in the include_path (in php.ini) as well |
context | Optional. Specifies the context of the file handle. Context is a set of options that can modify the behavior of a stream. Can be skipped by using NULL. |
start | Optional. Specifies where in the file to start reading. Negative values count from the end of the file |
max_length | Optional. Specifies the maximum length of data read. Default is read to EOF |
返回值: | 字符串中的整个文件,失败时为 FALSE |
---|---|
PHP 版本: | 4.3+ |
二进制安全: | 是的,在 PHP 4.3 中 |
PHP 变更日志: | PHP 7.1 - 支持负值开始范围 PHP 5.1 - 添加了开始和最长长度参数 |
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