我们以Demo模块为例，新建App/Demo/Models/Search.php

<?php namespace Phpcmf\Model;

// 模块内容搜索类

class My_Search extends \Phpcmf\Model\Search {

    
    // 自定义组合查询条件
    protected function mysearch($module, $where, $get) {
    
        // 重新对where条件的组装
        这里写格式化代码，把2018-03-22 转换成1521648000
    
        return $where;
    }
}

<script>
	function changedate() {
	var wuliuriqi = document.getElementById('inputdate').value;
	if(wuliuriqi) {
		var stringTime = wuliuriqi + " 01:00:00";
		var timestamp2 = Date.parse(new Date(stringTime));
		document.getElementById('wuliuriqi').value = timestamp2 / 1000;
	}
	return true;
    }
</script>

<div class="wuliu-search">
  <form action="" onsubmit="return changedate()" method="get" class="my_top_search">
  	<input name="c" value="search" type="hidden">
  	<input type="hidden" name="s" id="s" value="wuliu" />
	<div class="a"><input type="text" name="qdcs" id="qdcs" value="" placeholder="起点城市" /></div>
	<div class="b"><input type="text" name="zdcs" id="zdcs" value="" placeholder="终点城市" /></div>
	<div class="c"><input type="text" name="" id="inputdate" value="" placeholder="不限日期" />	<input type="hidden" name="wuliuriqi" id="wuliuriqi" value="" placeholder="不限日期" />	</div>
	<div class="d"><input type="submit" name="submit" value="搜索" class="kbut"></div>
  </form>
</div>
<script>
	function changedate() {
	var wuliuriqi = document.getElementById('inputdate').value;
	if(wuliuriqi) {
		var stringTime = wuliuriqi + " 01:00:00";
		var timestamp2 = Date.parse(new Date(stringTime));
		document.getElementById('wuliuriqi').value = timestamp2 / 1000;
	}
	return true;
    }
</script>