file_get_contents

Name:file_get_contents

Category:File system

Programming Language:php

One-line Description:Read the file into a string.

Definition and usage

file_get_contents() function reads the entire file into a string.

Like file() , the difference is that file_get_contents() reads the file into a string.

file_get_contents() function is the preferred method used to read the contents of a file into a string. If the operating system supports it, memory mapping technology will also be used to enhance performance.

实例

<?php
echo file_get_contents("test.txt");
?>

输出：

This is a test file with test text.

grammar

 file_get_contents ( path , include_path , context , start , max_length )

parameter	describe
path	Required. Specifies the file to be read.
include_path	Optional. If you also want to search for files in include_path, you can set this parameter to "1".
context	Optional. Specifies the environment for file handles. context is a set of options that can modify the behavior of a stream. If null is used, it will be ignored.
start	Optional. Specifies the location where reading begins in the file. This parameter is newly added in PHP 5.1.
max_length	Optional. Specifies the number of bytes to be read. This parameter is newly added in PHP 5.1.