Home > Article > Web Front-end > Detailed explanation of examples of select drop-down

Detailed explanation of examples of select drop-down

零下一度Original: 2017-06-24 10:24:521352browse

##name In fact, if there is a name, there is a value, because the button is submitted in the format of name=value. If you do not write the value, the submitted string will be the option string

Actually, it is similar to the input list. Option is used. Value does not need to be added, but assignment is generally used for database storage and calling. The database is more efficient for numeric indexes

##size No need to drop down, just like Taobao sellers select product category list...

optgroup This is not an attribute, it is just a node with multi-layer options. There are many labels used to divide nodes. For example, hgroup is used to organize titles, and

optgroup is used to organize data classification. Of course, this is only for performance, the actual classification is still in the database.

Three three groups, this is the optgroup and label.

multiple After the multi-select is true, press ctrl to select multiple lines

Multiple lines Text, if you want to submit it, it must also have name and value (that is, the content entered in the box), and the necessary conditions must still be in the <form> double box, <p><span style="font-size: 16pt"></span>## because it is not in the form In a double box, the button cannot submit name and value. Of course, it sometimes fails. Close and reopen the page or refresh it with ctrl+F5.</p>
<p style="margin-left: 36pt"><span style="font-size: 16pt"> </span></p>
<p></p>
<p>rows cols wrap is a textarea-specific setting<img src="https://img.php.cn/upload/article/000/000/001/931db0dc8d8307fcac019df19e6336dd-9.png" alt=""></p> <p></p> <p></p><p>The above is the detailed content of Detailed explanation of examples of select drop-down. For more information, please follow other related articles on the PHP Chinese website!</p></div><div class="nphpQianMsg"><div class="clear"></div></div><div class="nphpQianSheng"><span>Statement：</span><div>The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn</div></div></div><div class="nphpSytBox"><span>Previous article：<a class="dBlack" title="Example tutorial on html5 escaping entity characters" href="http://m.php.cn/faq/368009.html">Example tutorial on html5 escaping entity characters</a></span><span>Next article：<a class="dBlack" title="Example tutorial on html5 escaping entity characters" href="http://m.php.cn/faq/368011.html">Example tutorial on html5 escaping entity characters</a></span></div><div class="nphpSytBox2"><div class="nphpZbktTitle"><h2>Related articles</h2><em><a href="http://m.php.cn/article.html" class="bBlack"><i>See more</i><b></b></a></em><div class="clear"></div></div><ul class="nphpXgwzList"><li><b></b><a href="http://m.php.cn/faq/348757.html" title="Summary of Html knowledge" class="aBlack">Summary of Html knowledge</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348804.html" title="How to learn HTML quickly" class="aBlack">How to learn HTML quickly</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348873.html" title="The difference between html xhtml xml" class="aBlack">The difference between html xhtml xml</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348884.html" title="The difference between src and href attributes" class="aBlack">The difference between src and href attributes</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348902.html" title="About HTML5 and CSS replacement use" class="aBlack">About HTML5 and CSS replacement use</a><div class="clear"></div></li></ul></div></div><div class="nphpFoot"><div class="nphpFootBg"><ul class="nphpFootMenu"><li><a href="http://m.php.cn/"><b class="icon1"></b><p>Home</p></a></li><li><a href="http://m.php.cn/course.html"><b class="icon2"></b><p>Course</p></a></li><li><a href="http://m.php.cn/wenda.html"><b class="icon4"></b><p>Q&A</p></a></li><li><a href="http://m.php.cn/login"><b class="icon5"></b><p>My</p></a></li><div class="clear"></div></ul></div></div><div class="nphpYouBox" style="display: none;"><div class="nphpYouBg"><div class="nphpYouTitle"><span onclick="$('.nphpYouBox').hide()"></span><a href="http://m.php.cn/"></a><div class="clear"></div></div><ul class="nphpYouList"><li><a href="http://m.php.cn/"><b class="icon1"></b><span>Home</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/course.html"><b class="icon2"></b><span>Course</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/article.html"><b class="icon3"></b><span>Article</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/wenda.html"><b class="icon4"></b><span>Q&A</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/dic.html"><b class="icon6"></b><span>Dictionary</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/course/type/99.html"><b class="icon7"></b><span>Manual</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/xiazai/"><b class="icon8"></b><span>Download</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/faq/zt" title="Topic"><b class="icon12"></b><span>Topic</span><div class="clear"></div></a></li><div class="clear"></div></ul></div></div><div class="nphpDing" style="display: none;"><div class="nphpDinglogo"><a href="http://m.php.cn/"></a></div><div class="nphpNavIn1"><div class="swiper-container nphpNavSwiper1"><div class="swiper-wrapper"><div class="swiper-slide"><a href="http://m.php.cn/" >Home</a></div><div class="swiper-slide"><a href="http://m.php.cn/article.html" class="hover">Article</a></div><div class="swiper-slide"><a href="http://m.php.cn/wenda.html" >Q&A</a></div><div class="swiper-slide"><a href="http://m.php.cn/course.html" >Course</a></div><div class="swiper-slide"><a href="http://m.php.cn/faq/zt" >Topic</a></div><div class="swiper-slide"><a href="http://m.php.cn/xiazai"  >Download</a></div><div class="swiper-slide"><a href="http://m.php.cn/game" >Game</a></div><div class="swiper-slide"><a href="http://m.php.cn/dic.html" >Dictionary</a></div><div class="clear"></div></div></div><div class="langadivs"  ><a href="javascript:;" class="bg4 bglanguage"></a><div class="langadiv" ><a  onclick="javascript:setlang('zh-cn');" class="language course-right-orders chooselan "  href="javascript:;"><span>简体中文</span><span>（ZH-CN）</span></a><a  onclick="javascript:;" class="language course-right-orders chooselan chooselanguage"  href="javascript:;"><span>English</span><span>（EN）</span></a><a  onclick="javascript:setlang('zh-tw');" class="language course-right-orders chooselan "  href="javascript:;"><span>繁体中文</span><span>（ZH-TW）</span></a><a  onclick="javascript:setlang('ja');" class="language course-right-orders chooselan "  href="javascript:;"><span>日本語</span><span>（JA）</span></a><a  onclick="javascript:setlang('ko');" class="language course-right-orders chooselan "  href="javascript:;"><span>한국어</span><span>（KO）</span></a><a  onclick="javascript:setlang('ms');" class="language course-right-orders chooselan "  href="javascript:;"><span>Melayu</span><span>（MS）</span></a><a  onclick="javascript:setlang('fr');" class="language course-right-orders chooselan "  href="javascript:;"><span>Français</span><span>（FR）</span></a><a  onclick="javascript:setlang('de');" class="language course-right-orders chooselan "  href="javascript:;"><span>Deutsch</span><span>（DE）</span></a></div></div><script>            var swiper = new Swiper('.nphpNavSwiper1', {
                slidesPerView : 'auto',
                observer: true,//修改swiper自己或子元素时，自动初始化swiper
                observeParents: true,//修改swiper的父元素时，自动初始化swiper

});
        </script></div></div><script>isLogin = 0;</script><script type="text/javascript" src="/static/layui/layui.js"></script><script type="text/javascript" src="/static/js/global.js?4.9.47"></script></div><script src="https://vdse.bdstatic.com//search-video.v1.min.js"></script><link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css' type='text/css' media='all'/><script type='text/javascript' src='/static/js/viewer.min.js?1'></script><script type='text/javascript' src='/static/js/jquery-viewer.min.js'></script><script>jQuery.fn.wait = function (func, times, interval) {
    var _times = times || -1, //100次
    _interval = interval || 20, //20毫秒每次
    _self = this,
    _selector = this.selector, //选择器
    _iIntervalID; //定时器id
    if( this.length ){ //如果已经获取到了，就直接执行函数
        func && func.call(this);
    } else {
        _iIntervalID = setInterval(function() {
            if(!_times) { //是0就退出
                clearInterval(_iIntervalID);
            }
            _times <= 0 || _times--; //如果是正数就 --

_self = $(_selector); //再次选择
            if( _self.length ) { //判断是否取到
                func && func.call(_self);
                clearInterval(_iIntervalID);
            }
        }, _interval);
    }
    return this;
}
$("table.syntaxhighlighter").wait(function() {
    $('table.syntaxhighlighter').append("<p class='cnblogs_code_footer'><span class='cnblogs_code_footer_icon'></span></p>");
});
$(document).on("click", ".cnblogs_code_footer",function(){
      $(this).parents('table.syntaxhighlighter').css('display','inline-table');$(this).hide();
});
$('.nphpQianCont').viewer({navbar:true,title:false,toolbar:false,movable:false,viewed:function(){$('img').click(function(){$('.viewer-close').trigger('click');});}});
</script></body></html>