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How to upload files from external servers using file get contents() and file put contents() in PHP

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Definition

In this tutorial, I will show how to upload files from external servers into your server easily by using file_put_contents() and file_get_contents() functions. In that regard, you can even collect information from webpages on the web to collate data or scan related topics.

Usage:

file_get_contents():

This function is the preferred way to read the contents of a file into a string. It will use memory mapping techniques, if this is supported by the server, to enhance performance(1).

file_put_contents():

- If FILE_USE_INCLUDE_PATH is set, check the include path for a copy of filename(2)

- 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

- Note: Use FILE_APPEND to avoid deleting the existing content of the file.

Code


<-------------- PHP --------------->

<?php

// Get File from an external server. In this case, a Raspberry Pi picture from www.raspberrypi.org
$external_file_URL = "https://www.raspberrypi.org/homepage-9df4b/static/pi4-labelled-99c2e8935bb3cfdb27d23f634ea98a7e.png";
$external_file_content = file_get_contents($external_file_URL);

// Save File to the defined location.
$file_destination = "external_image.png";
file_put_contents($file_destination, $external_file_content);

// Show the recently uploaded file:
echo '<img src="external_image.png" style="display:block;margin:auto;width:80%;height:auto;border:2px solid white;"></img>';

?>

Result:

Save files from an external server. In this case, a Raspberry Pi picture from www.raspberrypi.org.

References

(1) https://www.w3schools.com/php/func_filesystem_file_get_contents.asp

(2) https://www.w3schools.com/php/func_filesystem_file_put_contents.asp