How to Read and Edit Configuration Files in PHP Using `parse_ini_file()` and Custom Functions?

Editing and Reading Configuration Files with PHP

In PHP, the parse_ini_file() function provides a convenient way to read data from an INI file, a common format for storing configuration settings. This function takes a file path as input and returns an array containing the key-value pairs defined in the INI file.

Reading Configuration Values

To read a specific configuration value, simply use array indexing on the array returned by parse_ini_file(). For instance, to obtain the value for "lu_link" or "footerbg", you can use:

<code class="php">$config = parse_ini_file("sample.ini");

$lu_link = $config["lu_link"];
$footerbg = $config["footerbg"];</code>

Updating Configuration Values

To update a configuration value, you can modify the array returned by parse_ini_file() and then write the array back to the INI file. PHP doesn't provide a built-in function for this task, but you can use a custom function like the one below:

<code class="php">function write_php_ini($array, $file)
{
    $res = array();
    foreach($array as $key => $val)
    {
        if(is_array($val))
        {
            $res[] = "[$key]";
            foreach($val as $skey => $sval) $res[] = "$skey = ".(is_numeric($sval) ? $sval : '"'.$sval.'"');
        }
        else $res[] = "$key = ".(is_numeric($val) ? $val : '"'.$val.'"');
    }
    safefilerewrite($file, implode("\r\n", $res));
}</code>

This function takes an array of key-value pairs and a file path as input, and writes the updated configuration to the INI file. It uses the safefilerewrite() function to safely write the data to the file, ensuring that it's not corrupted or truncated.

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