How to implement file_put_contents appending and line wrapping in php?

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In some PHP applications, you need to write logs or record some information. In this case. You can usefopen(), fwrite() andfclose() to operate. You can also simply usefile_get_contents() and file_put_contents().

file_put_contents() to write files.The default is to rewrite the file, which means the original content will be replaced. To append, use the parameter FILE_APPEND.

Write content in append form. When the flags parameter value is set to FILE_APPEND, it means writing new data by appending content after the existing file content:

FILE_APPEND：Write data by appending to the end of the file

int file_put_contents ( string filename, string data [, int flags [, resource context]] ) file_put_contents("log.txt", "Hello world everyone.", FILE_APPEND);

//Parameter description:

filename //To write Data file name

data //The data to be written. The type can be string,array(but notmultidimensional array), or stream resource

flags //Optional, specifies how to open/write Import the file. Possible values:

FILE_USE_INCLUDE_PATH: // Check the built-in path for a copy of filename

FILE_APPEND:// // Appended at the end of the file Method to write data

LOCK_EX: //Lock the file

context //Optional, Context is a set of options through which the text can be modifiedProperties

#Many times the log needs to be wrapped. 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 aconstantto match different operating systems, namely:

PHP_EOL

file_put_contents("log.txt", "Hello world everyone.".PHP_EOL, FILE_APPEND);

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