在做一个页面,类似刷微博时拉到最下面可以选择“加载更多”,现在通过ajax实现了对数据库的操作
function ajax() { var page=document.getElementById("pageNum").value++; //先声明一个异步请求对象 var xmlHttpReg = null; if (window.ActiveXObject) {//如果是IE xmlHttpReg = new ActiveXObject("Microsoft.XMLHTTP"); } else if (window.XMLHttpRequest) { xmlHttpReg = new XMLHttpRequest(); //实例化一个xmlHttpReg } //如果实例化成功,就调用open()方法,就开始准备向服务器发送请求 if (xmlHttpReg != null) { xmlHttpReg.open("get", "pro.php?index="+page, true); xmlHttpReg.send(null); xmlHttpReg.onreadystatechange = doResult; //设置回调函数 } //回调函数 //一旦readyState的值改变,将会调用这个函数,readyState=4表示完成相应 //设定函数doResult() function doResult() { if (xmlHttpReg.readyState == 4) {//4代表执行完成 if (xmlHttpReg.status == 200) {//200代表执行成功 //将xmlHttpReg.responseText的值赋给ID为resText的元素 document.getElementById("resText").innerHTML = xmlHttpReg.responseText; } } } }
后台数据库是php实现的,语句是
…………$sql="select * from tb_test limit ".$index*4;$result = mysql_query($sql, $con);
写到这儿不知道该怎么办了
通常情况下
使用while ($row=mysql_fetch_array($result)) {
……
}
就可以了,现在不知道改怎么输出,而且我的前台页面中,这些更新的数据是在一个table中
回复讨论(解决方案)
while ($row=mysql_fetch_array($result)) {
……
}
一样的在这个里面进行循环,但是此时可以加上tr等table下的标签然后组合成数组后,再转换成你要求的输出格式进行输出到结果就可以了。
将从数据库获取的数据(一般是数组),echo json_encode($res);
前台js用
var res=xmlHttpReg.responseText;
res=eval('('+res+')');
解出来
res['键名'],就可以获取对应的键值
将从数据库获取的数据(一般是数组),echo json_encode($res);
前台js用
var res=xmlHttpReg.responseText;
res=eval('('+res+')');
解出来
res['键名'],就可以获取对应的键值
然后在JS里面输出那些表格吗?
你可以像1楼说的,在php里面组织好表格(就是一个字符串),然后直接echo,js获取后不用解,直接插入到要显示的位置
因为我觉得js循环数据组织html比较麻烦(一般情况下),还不如php组织好直接输出

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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