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Home Backend Development PHP Tutorial javascript - 关于PHP处理JSON的问题。

javascript - 关于PHP处理JSON的问题。

Jun 06, 2016 pm 08:19 PM
javascript json php

<code>$array = ['a'=>'b','b'=>'c','d'=>function(){
    return 'e';
}];
echo json_encode($array);  </code>
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生成的JSON 如下
{"a":"b","b":"c","d":{}}

有没有什么办法使生成的结果中可以使用 JS的 匿名函数?
好多JS库的配置都是JSON的,但是他的配置有些使用的匿名函数来返回结果,这时候从服务端发回配置的时候,正常的
key-value配置转JSON可爽了,可是碰到JS的匿名方法就玩脱了。。。。

其实我就要这样的....

<code>var jsonText = {
    title: '提示',
    content: '按钮回调函数返回 false 则不许关闭',
    okValue: '确定',
    ok: function () {
        this.title('提交中…');
        return false;
    },
    cancelValue: '取消',
    cancel: function () {}
};</code>
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然而生成的却是

<code>{"title":"\u63d0\u793a","okValue":"\u786e\u5b9a","ok":"function(){return \"\u63d0\u4ea4\u4e2d...\";}"}</code>
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Copy after login

其中匿名方法,如你所见,被转成字符串了,玩脱了。。。
根据楼下兄弟的提点,完整的解决办法如下

<code>$data = ['title'=>'提示','okValue'=>'确定','ok'=>'function(){return "提交中...";}'];
$json = json_encode($data);
$json = str_replace(['"function','}"'],['function','}'], $json);
echo $json;</code>
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Copy after login

生成的json如下

<code>{"title":"\u63d0\u793a","okValue":"\u786e\u5b9a","ok":function(){return \"\u63d0\u4ea4\u4e2d...\";}}</code>
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Copy after login

回复内容:

<code>$array = ['a'=>'b','b'=>'c','d'=>function(){
    return 'e';
}];
echo json_encode($array);  </code>
Copy after login
Copy after login

生成的JSON 如下
{"a":"b","b":"c","d":{}}

有没有什么办法使生成的结果中可以使用 JS的 匿名函数?
好多JS库的配置都是JSON的,但是他的配置有些使用的匿名函数来返回结果,这时候从服务端发回配置的时候,正常的
key-value配置转JSON可爽了,可是碰到JS的匿名方法就玩脱了。。。。

其实我就要这样的....

<code>var jsonText = {
    title: '提示',
    content: '按钮回调函数返回 false 则不许关闭',
    okValue: '确定',
    ok: function () {
        this.title('提交中…');
        return false;
    },
    cancelValue: '取消',
    cancel: function () {}
};</code>
Copy after login
Copy after login

然而生成的却是

<code>{"title":"\u63d0\u793a","okValue":"\u786e\u5b9a","ok":"function(){return \"\u63d0\u4ea4\u4e2d...\";}"}</code>
Copy after login
Copy after login

其中匿名方法,如你所见,被转成字符串了,玩脱了。。。
根据楼下兄弟的提点,完整的解决办法如下

<code>$data = ['title'=>'提示','okValue'=>'确定','ok'=>'function(){return "提交中...";}'];
$json = json_encode($data);
$json = str_replace(['"function','}"'],['function','}'], $json);
echo $json;</code>
Copy after login
Copy after login

生成的json如下

<code>{"title":"\u63d0\u793a","okValue":"\u786e\u5b9a","ok":function(){return \"\u63d0\u4ea4\u4e2d...\";}}</code>
Copy after login
Copy after login

函数是无法通过json_encode方法来转换的,能转换的只有数据。你觉得这个简单的函数能帮你实现把php代码转为js代码的功能吗?

不过,其实还是有办法的,你这么搞

$array = ['a'=>'b','b'=>'c','d'=>'function(){return "e";}'];
echo json_encode($array); 
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然后在js端eval一下就好了

data = JSON.parse(json);
data.d = eval(data.d);
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更新

查看相关文档发现js如果遇到json的字符串是这种形式的function() {,就会报语法错误。解决方法是把这一段去掉

$array = ['a'=>'b','b'=>'c','d'=>"return 'e'"];
echo json_encode($array); 
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然后在解析的时候用匿名函数去执行

function getVal(str) {
    return function () { return eval(str); };
}

data = JSON.parse(json);
data.d = getVal(data.d);
console.log(data.d());
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