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Homephp教程php手册ajax返回值中有回车换行、空格的解决方法分享

这篇文章介绍了ajax返回值中有回车换行、空格的解决方法,有需要的朋友可以参考一下

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

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

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

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