Using JSON instead of text within a PHP array

Question

I have the following in my PHP to control access to a page:

<?php
    $array = array(
                   'Joe User',
                   'Tom Coffee',
                   'Edith McBurger',
                   'Dan Theman'
    );
    if (in_array($_SESSION['user_name'], $array)) {
    echo '<a href="page2link.php">Link Page</a><br>';
    }

?>

It works fine but I'd rather edit a JSON or other small text file instead of editing the whole page just to alter this list.

How do I write this so the list of names is in an external file and my PHP refers to that file?

use file_get_contents to get the file content with JSON data and use json_decode($fileData, true) to get the data in array. Then use can use in_array to check the $_SESSION as you are doin git now — Kumar Saurabh Sinha
– Kumar Saurabh Sinha, Commented Aug 8, 2014 at 17:27

Idan Magled · Accepted Answer · 2014-08-08 17:44:10Z

1

you can write an JSON file and then just json_decode it like this:

your text file:

{

"name":"idan"

}

your php code//

<?php

$string = file_get_contents("/your file location");
$json = json_decode($string,true);

echo  $json['name']; //and it will output the value "idan"

edited Aug 8, 2014 at 17:44

answered Aug 8, 2014 at 17:27

Idan Magled

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2 Comments

Kumar Saurabh Sinha Over a year ago

echo $json['key']; is going to give warning for undefined index

Idan Magled Over a year ago

json file works ny key and value - by 'key' its means the json key.

revo · Accepted Answer · 2014-08-08 17:53:44Z

0

Create a .txt file, write one name on separate lines. Then use file function to open the file. file() creates an array base on each line. Then you can use the rest of your snippet to authenticate.

auth.txt

Joe User
Tom Coffee
Edith McBurger
Dan Theman

auth.php

<?php
    $array = file('auth.txt', FILE_IGNORE_NEW_LINES);
    if (in_array($_SESSION['user_name'], $array))
    {
        echo '<a href="page2link.php">Link Page</a><br>';
    }
?>

You can use fopen('auth.txt', "a+") and fwrite() to dynamically write on file later, too.

edited Aug 8, 2014 at 17:53

answered Aug 8, 2014 at 17:32

revo

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