Ron's WIki

# How To's ## Iterate an associative array (map) ```php foreach ($map as $key ⇒ $value) {

  echo "{$key} => {$value} ";
  print_r($arr);

} ```

## Use a lambda to map an array of objects into a string ```php $getVideoUrl = function($video) : string {

return "<a href='".$video->video_url."'><img src='".$video->thumbnail_url."'/></a>";

}; … $videoUrls = $listing→videos != null ? implode(“,”, array_map($getVideoUrl, $listing→videos)) : “”; ```

## Getting request parameter and setting values

* http://max/php-manual/reserved.variables.html * `$_SERVER`

• http://max/php-manual/reserved.variables.server.html

* `$_GET`

• http://max/php-manual/reserved.variables.get.html (technically ALL params on the URL regardless of HTTP verb)

* `$_POST`

• http://max/php-manual/reserved.variables.post.html

* `$_FILES`

• http://max/php-manual/reserved.variables.files.html

* `$_REQUEST`

• http://max/php-manual/reserved.variables.request.html

``` // param value is null if missing $getParam = $_GET[“paramName”]; $postParam = $_POST[“paramName”]; $anyRequestParam = $_REQUEST[“paramName”]; ```

# String Formatting ## Number-to-string Formatting

source - https://www.php.net/manual/en/function.number-format.phphttps://www.php.net/manual/en/function.sprintf.php

`$nextSkuOrdinal = sprintf(“%03d”, $row['nextSkuOrdinal']);`