How to clear file contents in php

In PHP, you can use the file_put_contents() function to clear the file contents. This function can write a string into the file. If the "FILE_APPEND" value is not set, the file contents will be cleared; syntax " file_put_contents("file path","")".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use file_put_contents () function to clear the file contents.

The file_put_contents() function writes a string to a file. The syntax format is:

file_put_contents(file,data,mode,context)

• If FILE_USE_INCLUDE_PATH is set, *filename will be checked * Built-in path to copy

• If the file does not exist, a file will be created

• Open the file

• If LOCK_EX is set, the file will be locked

• If FILE_APPEND is set, it will be moved to the end of the file. Otherwise, the contents of the file will be cleared

• Write data to the file

• Close the file and unlock all files

• If successful, this function returns the number of characters written to the file. On failure, False is returned.

Example: Clear file content

<?php
echo file_put_contents("sites.txt","");
?>

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