<?php $a=array("red","green"); array_push($a,"blue","yellow"); print_r($a); ?>
输出
Array ( [0] => red [1] => green [2] => blue [3] => yellow )
参考：
https://www.w3school.com.cn/php/php_ref_array.asp
php 数组插入元素
原文：https://www.cnblogs.com/sea-stream/p/11261722.html
