PHP file_put_contents () function
Complete PHP Filesystem Reference Manual Definition and Usage
file_put_contents () function takes a string to the file.
The function to access the file, follow these rules:
- If the FILE_USE_INCLUDE_PATH, then checks the * filename * Built-copy path
- If the file does not exist, create a file
- open a file
- If the LOCK_EX, then the lock file
- If the FILE_APPEND, it will be moved to the end of the file. Otherwise, it will clear the contents of the file
- Write data to a file
- Close the file and unlock all files
If successful, the function returns the number of characters written to the file. If it fails, it returns False.
grammar
file_put_contents(file,data,mode,context)
| 参数 | 描述 |
|---|---|
| file | 必需。规定要写入数据的文件。如果文件不存在，则创建一个新文件。 |
| data | 必需。规定要写入文件的数据。可以是字符串、数组或数据流。 |
| mode | 可选。规定如何打开/写入文件。可能的值：
|
| context | 可选。规定文件句柄的环境。context 是一套可以修改流的行为的选项。 |
Tips and Notes
NOTE: Use FILE_APPEND avoid deleting files that already exist in the content.
Examples
<?php
echo file_put_contents("test.txt","Hello World. Testing!");
?>
echo file_put_contents("test.txt","Hello World. Testing!");
?>
The code above will output:
21
Complete PHP Filesystem Reference Manual