Sample code of DFP Async setTargeting support for ACM

dfp-async-sample.php

<?php


class Doubleclick_For_Publishers_Async_ACM_Provider extends ACM_Provider {
  public $crawler_user_agent = 'Mediapartners-Google';

	function filter_output_html(  $output_html, $tag_id ) {
		// .. omitted
		$targeting_params_array = apply_filters( 'acm_targeting_params', array( 'kw' => 'testkeyword' ), $tag_id );
		$targeting_string = $this->format_targeting_string( $targeting_params_array );
		// .. omitted
	}

	/**
	 * Format setTargeting string
	 * @param  array  $params_array [description]
	 * @return string               [description]
	 */
	function format_targeting_string( $params_array = array() ) {
		$ret = '';
		// Iterate over array of key value pairs and format a string
		foreach( (array) $params_array as $key => $value ) {
			// .. sanitize, validate, and append
		}

		return $ret;
	}
}

What, you didn't like my idea to just allow anything at all to be appended to the end of the slot definition? Haha.

This is a much better idea you've got here.

Is it necessary to send a sample array or tag id to the filter, do you think?