Home Backend Development PHP Tutorial ajax返回值中有回车换行、空格的解决方法分享_php技巧

ajax返回值中有回车换行、空格的解决方法分享_php技巧

May 17, 2016 am 08:54 AM
ajax return value

最近在写一个页面,用jquery ajax来实现判断,刚写好测试完全没有问题,过了两天发现出现问题,判断不成了。后来发现所有alert出来的返回值前面都会加若干换行和空格。(至今不明白,同一台电脑,同样的环境,为什么出现这样的问题)

后来在网上发现也有人遇到了相同的问题。无论是jquery $.ajax  $.get  $.post 在或者是原声的XMLHttpRequest方法都存在这种问题,这样调用的时候和判断的时候,有时候会出错。看例子

ajax代码:

复制代码 代码如下:

$.get('ajax.php',{'name':name},function(data){
   alert(data);     
})

ajax.php

复制代码 代码如下:

    $username = $_GET['name'];
    echo $username;
?>

ajax返回值中有回车换行、空格的解决方法分享_php技巧

明显name为google的字符串前面有换行或空格,这样严重的影响了程序的稳健性,我都遇到出现了问题,下面程序的判断都不成立。因此我们需要用正则表达式的方法来去除,因此我们可以这样写

复制代码 代码如下:

$.get('ajax.php',{'name':name},function(data){
    newData=data.replace(/\s/g,'');
    alert(newData);     
})

ajax.php不用变

ajax返回值中有回车换行、空格的解决方法分享_php技巧

然后就没有换行空格了。

我在网上看到的都是用

newData=data.replace(/rn/g,'');

但我发现这个正则对我的有问题,前面只减少了一部分空白字符,因此我判断空白字符里应该有除了换行回车外的其余空白字符,因此选用了s。

/.../g 是正则表达式的属性, 表示全文匹配, 而不是找到一个就停止

Statement of this Website
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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to solve the 403 error encountered by jQuery AJAX request How to solve the 403 error encountered by jQuery AJAX request Feb 20, 2024 am 10:07 AM

Title: Methods and code examples to resolve 403 errors in jQuery AJAX requests. The 403 error refers to a request that the server prohibits access to a resource. This error usually occurs because the request lacks permissions or is rejected by the server. When making jQueryAJAX requests, you sometimes encounter this situation. This article will introduce how to solve this problem and provide code examples. Solution: Check permissions: First ensure that the requested URL address is correct and verify that you have sufficient permissions to access the resource.

How to solve jQuery AJAX request 403 error How to solve jQuery AJAX request 403 error Feb 19, 2024 pm 05:55 PM

jQuery is a popular JavaScript library used to simplify client-side development. AJAX is a technology that sends asynchronous requests and interacts with the server without reloading the entire web page. However, when using jQuery to make AJAX requests, you sometimes encounter 403 errors. 403 errors are usually server-denied access errors, possibly due to security policy or permission issues. In this article, we will discuss how to resolve jQueryAJAX request encountering 403 error

How to get variables from PHP method using Ajax? How to get variables from PHP method using Ajax? Mar 09, 2024 pm 05:36 PM

Using Ajax to obtain variables from PHP methods is a common scenario in web development. Through Ajax, the page can be dynamically obtained without refreshing the data. In this article, we will introduce how to use Ajax to get variables from PHP methods, and provide specific code examples. First, we need to write a PHP file to handle the Ajax request and return the required variables. Here is sample code for a simple PHP file getData.php:

How to solve the problem of jQuery AJAX error 403? How to solve the problem of jQuery AJAX error 403? Feb 23, 2024 pm 04:27 PM

How to solve the problem of jQueryAJAX error 403? When developing web applications, jQuery is often used to send asynchronous requests. However, sometimes you may encounter error code 403 when using jQueryAJAX, indicating that access is forbidden by the server. This is usually caused by server-side security settings, but there are ways to work around it. This article will introduce how to solve the problem of jQueryAJAX error 403 and provide specific code examples. 1. to make

PHP and Ajax: Building an autocomplete suggestion engine PHP and Ajax: Building an autocomplete suggestion engine Jun 02, 2024 pm 08:39 PM

Build an autocomplete suggestion engine using PHP and Ajax: Server-side script: handles Ajax requests and returns suggestions (autocomplete.php). Client script: Send Ajax request and display suggestions (autocomplete.js). Practical case: Include script in HTML page and specify search-input element identifier.

PHP vs. Ajax: Solutions for creating dynamically loaded content PHP vs. Ajax: Solutions for creating dynamically loaded content Jun 06, 2024 pm 01:12 PM

Ajax (Asynchronous JavaScript and XML) allows adding dynamic content without reloading the page. Using PHP and Ajax, you can dynamically load a product list: HTML creates a page with a container element, and the Ajax request adds the data to that element after loading it. JavaScript uses Ajax to send a request to the server through XMLHttpRequest to obtain product data in JSON format from the server. PHP uses MySQL to query product data from the database and encode it into JSON format. JavaScript parses the JSON data and displays it in the page container. Clicking the button triggers an Ajax request to load the product list.

Can a Golang function return multiple values? Can a Golang function return multiple values? Apr 13, 2024 pm 02:42 PM

Yes, Go functions can return multiple values ​​by returning a tuple, which is an immutable value that can contain different types of data.

C++ function pointer as function return value C++ function pointer as function return value Apr 14, 2024 am 08:30 AM

Function pointers can be used as function return values, allowing us to determine at runtime which function to call. The syntax is: returntype(*function_name)(param1,param2,...). Advantages include dynamic binding and a callback mechanism that allow us to adjust function calls as needed.

See all articles