How to parse ipconfig output with PHP

ipconfig output can be parsed programmatically using PHP to extract network configuration values. This approach converts the colon-delimited key-value format of ipconfig into structured data for automation or reporting.

Prerequisites

• Windows operating system with ipconfig available in Windows Command Prompt.
• PHP installed on the system (PHP 7.0 or later).
• ipconfig output captured in a string variable (via shell_exec('ipconfig /all') or from a text file).

Step-by-Step: Parse ipconfig Output with PHP

1. Capture the ipconfig output. Run ipconfig /all and store the result in a variable, or read it from a saved text file.

   

2. Use this PHP script to parse ipconfig output into key-value pairs. The script iterates through each line, splits on the colon delimiter, and extracts the field name and value.

   <?php
   foreach ($lines as $line)
   {
       $index = stripos($line, ":");
       if ($index <= 0) { continue; } // skip empty lines
       $key = trim(substr($line, 0, $index), '. ');
       $value_substr = substr($line, $index + 1);
       $value = str_replace("(Preferred)", "", $value_substr);
       $value = trim($value);
       echo "$key: $value\n";
   }
   ?>

3. The PHP script processes each line of ipconfig output as follows:

   • The $lines variable contains all lines of ipconfig output as an array of strings.
   • The stripos() function finds the position of the colon ( :) delimiter in each line.
   • Lines without a colon are skipped because they are section headers or blank lines.
   • The substr() function splits each line at the colon to extract the field name (key) and value.
   • The trim() function removes leading dots and whitespace from the field name.
   • The str_replace() function removes the "(Preferred)" suffix that ipconfig appends to the active IP address.

How to Verify the Parsed Output

Run the PHP script and compare the extracted values against the raw ipconfig output. Each key-value pair should match a line from the original ipconfig /all output. Verify that fields such as "IPv4 Address", "Subnet Mask", and "Default Gateway" appear with their correct values.

Common Issues When Parsing ipconfig Output

• Missing fields in output:Some ipconfig fields span multiple lines or use inconsistent formatting. Lines without a colon delimiter are skipped by this script. Adapt the parsing logic for multiline values such as DNS Suffix Search List entries.
• Character encoding issues:ipconfig output on non-English Windows systems may use different character encodings. Set the PHP script's encoding to match the system locale.
• "(Preferred)" suffix not removed:Verify the str_replace() call matches the exact suffix text. Some Windows versions or locales use different text for this marker.