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javascript - PHP 通过 AJAX 和 Async 在 Javascript 中

转载 作者:行者123 更新时间:2023-12-02 17:15:30 25 4
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据我了解,AJAX 使 javascript 异步。我是 AJAX 新手,但注意到在 html 文档创建脚本时有一个脚本异步属性。这些与 AJAX 做同样的事情还是我一厢情愿。我发现在 DOM 生成中使用的现有 javascript 文件中使用 php 非常有用。为什么?让生活变得更轻松并且尽可能面向对象。我唯一想要的就是使用 php 输出由 javascript 生成的 php 文件,但后来我想直接使用 javascript 方法生成 php。

index.php

 <!DOCTYPE html>

<script type="text/javascript" src="jWebKit.js"></script>

<script>

var div = new Div();
div.setPosition(Div.FIXED);
div.setBounds(100,0,100,100);
div.horizontalAlign(Div.LEFT);
div.setPosition(Div.RELATIVE);

</script>

jWebKit.js

    var head;
var body;
var jScript;
var devScript;
var phpScript;

(function(){

document.open();

jScript = document.createElement("script");
jScript.src = "jWebKit.js";
jScript.type = "text/javascript";


devScript = document.createElement("script");

phpScript = document.createElement("script");
php.type = "text/javascript";
php.text = 'document.write("<?php fopen("testfile.php", "w") ;?>");'; // This is the target script needed for file output below...
phpScript.async = 'true';


}());

window.onload = function(){

var cutScript;

head = document.head;
body = document.body;

cutScript = head.innerHTML.toString().replace(jScript.outerHTML.toString(),'');



devScript.text = phpScript.innerHTML.toString() + cutScript.replace('<script>', '').replace('</script>','');//Does not work!

body.appendChild(devScript);
head.innerHTML = head.innerHTML.toString().replace(cutScript,'');



alert(document.documentElement.outerHTML);

document.close();


};

function Div(){

Div.STATIC = 'static';
Div.ABSOLUTE = 'absolute';
Div.RELATIVE = 'relative';
Div.FIXED = 'fixed';
Div.SOLID = 'solid';
Div.DOTTED = 'dotted';
Div.LEFT = 0;
Div.CENTER = 1;
Div.RIGHT = 2;
Div.TOP = 0;
Div.MIDDLE = 1;
Div.BOTTOM = 2;

var ELEMENT;
var CSS;

var horizontalAlign;
var verticalAlign;

var colorQueue;



(function() {

this.div = document.createElement('div');

ELEMENT = this.div;
CSS = this.div.style;

CSS.border = '1px solid black';

document.body.appendChild(this.div);

}());

this.setPosition = function(postype){

if(!horizontalAlign && !verticalAlign){

CSS.position = postype;

}


}

this.setBounds = function(x,y,width,height){

CSS.left = x + 'px';
CSS.top = y + 'px';
CSS.width = width + 'px';
CSS.height = height + 'px';

}

this.setColorQueue = function(r,g,b){

colorQueue = 'rgb(' + new Array(r,g,b) + ')';
alert(colorQueue);

}

this.horizontalAlign = function(horiz){

var freeSpaceX = ((window.innerWidth - ELEMENT.offsetWidth) / 2);
var defPadding = '8px';
var defPaddingCenter;
var defPaddingRight;
var defPaddingLeft;

horizontalAlign = true;

this.setBounds(0,0,100,100);

if(CSS.position == 'relative' || CSS.position == 'absolute'){

CSS.position = 'absolute';
defPaddingCenter = 12;
defPaddingRight = 4;
defPaddingLeft = 8;



}else if(CSS.position == 'fixed'){

defPaddingCenter = 4;
defPaddingRight = 4;
defPaddingLeft = 8;

}

if(horiz == 0){

if(!verticalAlign){
CSS.marginTop = defPadding;
}CSS.marginLeft = defPaddingLeft + 'px';

}else if(horiz == 1){

if(!verticalAlign){
CSS.marginTop = defPadding;
}CSS.marginLeft = freeSpaceX - defPaddingCenter + 'px';

}else if(horiz == 2){

if(!verticalAlign){
CSS.marginTop = defPadding;
}CSS.marginLeft = (freeSpaceX - defPaddingRight) * 2 + 'px';

}

}

}

最佳答案

我不知道你到底想做什么,但是你正在创建一个永远不会访问服务器的php脚本,因此如果你想调用url testfile.php,它永远不会执行(只有服务器理解php脚本)你应该做这样的事情

xmlhttp = new XMLHttpRequest();
xmlhttp.open("GET","testfile.php?q=something",true);
xmlhttp.send();

xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
//the responseText have the server response
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}

请访问此网站了解更多信息

http://www.w3schools.com/ajax/ajax_xmlhttprequest_create.asp

也可以通过链接查看下一章

顺便说一句,jquery 会为你提供很多帮助

关于javascript - PHP 通过 AJAX 和 Async 在 Javascript 中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24480934/

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