我经常在PHP中使用双引号来插值变量，而不是将字符串连接起来。因此，在生成HTML时，我通常使用单引号来设置标记字段。例如：
$html = "<input type='text' name='address' value='$address'>";
现在，这对我来说比任何其他东西都更易读
$html = "<input type=\"text\" name=\"address\" value=\"$address\">";
$html = '<input type="text" name="address" values="' . $address . '">' ;
根据我简短的搜索，我听说某些浏览器不识别HTML字段中的单引号。因此，我想知道哪些浏览器会有问题识别单引号HTML？
这类似于单引号在HTML中何时变得如此流行？，在HTML属性周围使用单引号一直都被规范允许。我认为任何浏览器都能理解它们。
<img src='cid:xxx' ... /> 来展示内联图片，它将完全不会显示，因为内容 ID 被忽略了。你必须使用 <img src="cid:xxx" ... />。 - Earth Engine我听到有人说用单引号为HTML字段可能不被每个浏览器识别
那个人是错的。
来自
HTML
Living Standard — Last Updated 17 September 2021
[...]
13.1.2.3 Attributes
Single-quoted attribute value syntax
The attribute name, followed by zero or more ASCII whitespace, followed by a single U+003D EQUALS SIGN character, followed by zero or more ASCII whitespace, followed by a single U+0027 APOSTROPHE character ('), followed by the attribute value, which, in addition to the requirements given above for attribute values, must not contain any literal U+0027 APOSTROPHE characters ('), and finally followed by a second single U+0027 APOSTROPHE character (').
In the following example, the type attribute is given with the single-quoted attribute value syntax:<input type='checkbox'>If an attribute using the single-quoted attribute syntax is to be followed by another attribute, then there must be ASCII whitespace separating the two.
— https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
—— https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
不要相信互联网上看到的一切......
有趣的是，我刚刚回答了一个类似的问题，有人声称单引号在XHTML中无效......
嗯，我边打字边往上看，看到Adam N也传播了同样的观点。如果他能支持自己的说法，我撤回我写的东西......据我所知，XML是不可知的，并接受两种引号。我甚至尝试并验证了只有单引号的XHTML页面，没有问题。
唯一的问题是数据输入到文本输入框中。请考虑以下内容：
<input value='it's gonna break'/>
同理：
<input value="i say - "this is gonna be trouble" "/>
你无法逃避，必须使用 htmlspecialchars。
<input value="it's not gonna break"/>；反之同理：<input value='i say - "this is not gonna be trouble"'/>。 - Triynkohtmlspecialchars。变量插值是很好的语法糖，但其反面是它容易导致难以发现的XSS漏洞。 - Ruud Helderman我在HTML中也倾向于使用单引号，而且从未遇到过问题。
我在HTML页面中使用了单引号，并将JavaScript嵌入其中，它运行良好。在IE9、Chrome和Firefox中进行了测试，似乎一切正常。
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'>
<meta http-equiv='X-UA-Compatible' content='IE=edge,chrome=1'>
<title>Bethanie Inc. data : geographically linked</title>
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js'></script>
<script src='https://maps.googleapis.com/maps/api/js?v=3.11&sensor=false' type='text/javascript'></script>
<script type='text/javascript'>
// check DOM Ready
$(document).ready(function() {
// execute
(function() {
/////////////// Addresses ///////////////////
var locations = new Array();
var i = 0;
locations[i++] = 'L,Riversea: Comp Site1 at Riversea,1 Wallace Lane Mosman Park WA 6012'
locations[i++] = 'L,Wearne: Comp Site2 at Wearne,1 Gibney St Cottesloe WA 6011'
locations[i++] = 'L,Beachside:Comp Site3 Beachside,629 Two Rocks Rd Yanchep WA 6035'
/////// Addresses/////////
var total_locations = i;
i = 0;
console.log('About to look up ' + total_locations + ' locations');
// map options
var options = {
zoom: 10,
center: new google.maps.LatLng(-31.982484, 115.789329),//Bethanie
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: true
};
// init map
console.log('Initialise map...');
var map = new google.maps.Map(document.getElementById('map_canvas'), options);
// use the Google API to translate addresses to GPS coordinates
//(See Limits: https://developers.google.com/maps/documentation/geocoding/#Limits)
var geocoder = new google.maps.Geocoder();
if (geocoder) {
console.log('Got a new instance of Google Geocoder object');
// Call function 'createNextMarker' every second
var myVar = window.setInterval(function(){createNextMarker()}, 700);
function createNextMarker() {
if (i < locations.length)
{
var customer = locations[i];
var parts = customer.split(','); // split line into parts (fields)
var type= parts.splice(0,1); // type from location line (remove)
var name = parts.splice(0,1); // name from location line(remove)
var address =parts.join(','); // combine remaining parts
console.log('Looking up ' + name + ' at address ' + address);
geocoder.geocode({ 'address': address }, makeCallback(name, type));
i++; // next location in list
updateProgressBar(i / total_locations);
} else
{
console.log('Ready looking up ' + i + ' addresses');
window.clearInterval(myVar);
}
}
function makeCallback(name,type)
{
var geocodeCallBack = function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var longitude = results[0].geometry.location.lng();
var latitude = results[0].geometry.location.lat();
console.log('Received result: lat:' + latitude + ' long:' + longitude);
var marker = new google.maps.Marker({
position: new google.maps.LatLng(latitude, longitude),
map: map,
title: name + ' : ' + '\r\n' + results[0].formatted_address});// this is display in tool tip/ icon color
if (type=='E') {marker.setIcon('http://maps.google.com/mapfiles/ms/icons/green-dot.png')};
最近我遇到了一些谷歌搜索优化的问题。如果链接中有单引号，它似乎无法爬取关联页面。
<a href=''>属性中吗？ - AntonChanning...或者直接使用heredocs。这样你就不需要担心转义任何东西，只需关注END即可。