How to implement append and line wrapping in PHP file_put_contents

This article mainly introduces PHP file_put_contents implementation of the method of adding and wrapping, interested in the friend's reference, I hope to help you.

In some applications of PHP, you need to write a log or record some information. You can do this using fopen (), fwrite (), and fclose (). You can also simply use file_get_contents () and file_put_contents ().

file_put_contents () write the file. The default is to re-write the file, which will replace the original content. Append the words using the parameter file_append.

Write content in append form when the flags parameter value is File_append, the new data is written in such a way that the content is appended after the contents of the existing file:

file_append: writes data appended to the end of the file

int file_put_contents (string filename, string data [, int flags [, resource context]]) file_put_contents ("Log.txt", "Hel Lo world Everyone. ", file_append);

Parameter description:

FileName//file name to write data to

Data//To be written. The type can be String,array (but not a multidimensional array), or a stream resource

Flags//optional, which specifies how to open/write files. Possible values:

file_use_include_path://Check the built-in path of the filename copy

file_append://writes data to the end of the file in append form

lock_ex://Lock the file

Context//optional, context is a set of options through which you can modify text properties

There are many times when logging requires a line break. It is not recommended to use \ r \ n because:

In Windows \ r \ n is a newline

In Mac \ r is a newline

In Liunx, \ n is a newline.

But PHP provides a constant to match different operating systems, namely:

Php_eol

File_put_contents ("Log.txt", "Hello World everyone.") Php_eol, File_append);

The above is the whole content of this article, I hope that everyone's study has helped.