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PHP Quiz PHP CertificatePHP file_put_contents() Function
Complete PHP Filesystem Reference
Definition and Usage
The file_put_contents() writes a string to a file.
This function follows these rules when accessing a file:
- If FILE_USE_INCLUDE_PATH is set, check the include path for a copy of *filename*
- Create the file if it does not exist
- Open the file
- Lock the file if LOCK_EX is set
- If FILE_APPEND is set, move to the end of the file. Otherwise, clear the file content
- Write the data into the file
- Close the file and release any locks
This function returns the number of character written into the file on success, or FALSE on failure.
Syntax
file_put_contents(file,data,mode,context)
| Parameter | Description |
|---|---|
| file | Required. Specifies the file to write to. If the file does not exist, this function will create one |
| data | Required. The data to write to the file. Can be a string, an array or a data stream |
| mode | Optional. Specifies how to open/write to the file. Possible
values:
|
| context | Optional. Specifies the context of the file handle. Context is a set of options that can modify the behavior of a stream. |
Tips and Notes
Note: Use FILE_APPEND to avoid deleting the existing content of the file.
Example
<?php
echo file_put_contents("test.txt","Hello World. Testing!");
?>
echo file_put_contents("test.txt","Hello World. Testing!");
?>
The output of the code above will be:
21
Complete PHP Filesystem Reference
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