[Wordpress] 投稿タイプ、タクソノミ、件数指定して大量のテスト用投稿をinsertする

hytInsertMockPosts.php

<?php
class hytInsertMockPosts {
	public function __construct($post_type = 'post',$taxonomies = ['category'],$num = 10){
		$this->post_type = $post_type;
		$this->taxonomies = $taxonomies;
		$this->num = $num;
	}
	public function mbRange($start, $end){
		if ($start == $end) {
			return array($start);
		}

		$_result = array();

		list(, $_start, $_end) = unpack("N*", mb_convert_encoding($start . $end, "UTF-32BE", "UTF-8"));

		$_offset  = $_start < $_end ? 1 : -1;
		$_current = $_start;

		while ($_current != $_end) {
			$_result[]  = mb_convert_encoding(pack("N*", $_current), "UTF-8", "UTF-32BE");
			$_current  += $_offset;
		}
		$_result[] = $end;

		return $_result;
	}

	public function makeRandStr($length) {
		$str = array_merge(range('a', 'z'), range('0', '9'), range('A', 'Z'), $this->mbRange('あ', 'ん'));
		$r_str = null;
		for ($i = 0; $i < $length; $i++) {
			$r_str .= $str[rand(0, count($str) - 1)];
		}
		return $r_str;
	}

	private function getRelateTerms(){
		$relate_taxonomies = [];
		foreach($this->taxonomies as $tax){
			$targets = get_terms($tax,[ 'hide_empty' => false]);
			foreach($targets as $target){
				$relate_taxonomies[$tax][] = $target->term_id;
			}
		}

		return $relate_taxonomies;
	}

	public function insertMock(){
		$taxes = $this->taxonomies;
		$relate_taxonomies = $this->getRelateTerms();
		foreach($taxes as $tax){
			$targets = get_terms($tax,[ 'hide_empty' => false]);
			foreach($targets as $target){
				$relate_taxonomies[$tax][] = $target->term_id;
			}
		}

		for($i=0;$i<$this->num;$i++){
			$post = [
				'post_title'=>$this->makeRandStr(30),
				'post_content'=>$this->makeRandStr(400),
				'post_type' => $this->post_type,
				'post_status' => 'publish'
			];
			$newpost = wp_insert_post($post,true);

			foreach($taxes as $tax){
				shuffle($relate_taxonomies[$tax]);
				$end = (count($relate_taxonomies[$tax]) > 3) ? 3 : max($relate_taxonomies[$tax]);
				$offset = rand(1,$end);
				$r_taxes = array_slice($relate_taxonomies[$tax],0,$offset);
				wp_set_object_terms($newpost,$r_taxes,$tax);
			}
		}
	}
}

//example
require_once('{path}hytInsertMockPosts.php');
function insertMock(){
	$mock = new hytInsertMockPosts('facilities',['genre','place1','place2'],300);
	$mock->insertMock();
}
add_action( 'wp_head', 'insertMock', 9999 );