$sanitizer->flatArray() method

Given a potentially multi-dimensional array, return a flat 1-dimensional array

Available since version 3.0.160.


// basic usage
$array = $sanitizer->flatArray(array $value);

// usage with all arguments
$array = $sanitizer->flatArray(array $value, array $options = []);


options (optional)array
  • preserveKeys (bool): Preserve associative array keys where possible? (default=false)
  • maxDepth (int): Max depth of nested arrays to flatten into value, after which they are discarded (default=0). The default value of 0 removes any nested arrays, so specify 1 or higher to include them.

Return value


$sanitizer methods and properties

API reference based on ProcessWire core version 3.0.209

Twitter updates

  • Adding custom actions to ProcessWire image fields in the admin, part of this week’s dev branch additions: More
    27 January 2023
  • ProcessWire 3.0.210 new main/master version released— More
    6 January 2023
  • ProcessWire 3.0.209: Core updates and an interesting AI that knows ProcessWire– More
    30 December 2022

Latest news

  • ProcessWire Weekly #455
    In the 455th issue of ProcessWire Weekly we'll check out the latest core updates, introduce a new third party module called JkPublishPages, and more. Read on!
    Weekly.pw / 28 January 2023
  • ProcessWire 3.0.210 new main/master version
    140 commits, 55 resolved issues, dozens of new features, eight contributors, and five new pull requests make yet another great new version of ProcessWire.
    Blog / 6 January 2023
  • Subscribe to weekly ProcessWire news

“…building with ProcessWire was a breeze, I really love all the flexibility the system provides. I can’t imagine using any other CMS in the future.” —Thomas Aull