How to write an array to a file in php (three methods)

In PHP, you can use the following methods to write an array to a file:

Method 1: Use the fwrite() function

In this method, we first need to open the file , and then use the fwrite() function to write the array to the file. Below is a sample code where we open a file named "data.txt" and write an array named "my_data" into it:

<?php
$my_data = array("Apple","Banana","Orange");

$file = fopen("data.txt","w");
if($file)
{
  fwrite($file,serialize($my_data));
  fclose($file);
}
?>

In the above code, we first define An array named "my_data" is created, and then we open a file named "data.txt". If the file is opened successfully, we convert the array to a string using PHP's serialize() function and write it to the file using the fwrite() function. Finally, we close the file.

Method 2: Using file_put_contents() function

In this method, we can easily write the entire array to a file using PHP’s file_put_contents() function. Here is a sample code:

<?php
$my_data = array("Apple","Banana","Orange");
file_put_contents("data.txt",serialize($my_data));
?>

In the above code, we first define an array named "my_data". We then write the entire array to a file using the file_put_contents() function. The first parameter of this function is the file name, and the second parameter is the data to be written.

Method 3: Use json_encode() function

In this method, we can use PHP's json_encode() function to convert the array into JSON format and write it to a file. Here is a sample code:

<?php
$my_data = array("Apple","Banana","Orange");
file_put_contents("data.txt", json_encode($my_data));
?>

In the above sample code, we first define an array named "my_data". We then convert the array to a JSON string using the json_encode() function and write it to a file using the file_put_contents() function.

Summary

In this article, we introduced three methods of writing arrays to files in PHP. These methods include using the fwrite() function, file_put_contents() function and json_encode() function. You can choose one of the methods according to your needs. I hope this article helped you learn how to write an array to a file.

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