起步 - if语句 ¶

作者：KK
发表日期：2016.3.20

PHP的if语句写法和JS几乎一模一样,用JS的写法完全可以,语句的含义却是完全一模一样的

而PHP的写法只有一个不同,就是else if可以不带空格,直接写elseif,例子:

if($age < 0){
	
}elseif($age >=18){

}else{
	//....
}

var shiftWindow = function () { scrollBy(0, -50) }; if (location.hash) setTimeout(shiftWindow, 1); window.addEventListener("hashchange", shiftWindow); var element = document.createElement("script"); element.src = "./jssearch.index.js"; document.body.appendChild(element); var searchBox = $('#searchbox'); // search when typing in search field searchBox.on("keyup", function(event) { var query = $(this).val(); if (query == '' || event.which == 27) { $('#search-resultbox').hide(); return; } else if (event.which == 13) { var selectedLink = $('#search-resultbox a.selected'); if (selectedLink.length != 0) { document.location = selectedLink.attr('href'); return; } } else if (event.which == 38 || event.which == 40) { $('#search-resultbox').show(); var selected = $('#search-resultbox a.selected'); if (selected.length == 0) { $('#search-results').find('a').first().addClass('selected'); } else { var next; if (event.which == 40) { next = selected.parent().next().find('a').first(); } else { next = selected.parent().prev().find('a').first(); } if (next.length != 0) { var resultbox = $('#search-results'); var position = next.position(); // TODO scrolling is buggy and jumps around // resultbox.scrollTop(Math.floor(position.top)); // console.log(position.top); selected.removeClass('selected'); next.addClass('selected'); } } return; } $('#search-resultbox').show(); $('#search-results').html('

No results

'); var result = jssearch.search(query); if (result.length > 0) { var i = 0; var resHtml = ''; for (var key in result) { if (i++ > 20) { break; } resHtml = resHtml + '

' + result[key].file.t + '' + '' + result[key].file.d + '

'; } $('#search-results').html(resHtml); } }); // hide the search results on ESC $(document).on("keyup", function(event) { if (event.which == 27) { $('#search-resultbox').hide(); } }); // hide search results on click to document $(document).bind('click', function (e) { $('#search-resultbox').hide(); }); // except the following: searchBox.bind('click', function(e) { e.stopPropagation(); }); $('#search-resultbox').bind('click', function(e) { e.stopPropagation(); }); });