返回null的json_encode

Question

Array
(
    [sEcho] => 1
    [iTotalRecords] => 7521
    [iTotalDisplayRecords] => 1
    [aaData] => Array
        (
            [0] => Array
                (
                    [0] => Nordic Capital Buys SiC Processing
                    [1] => 2010-06-21/nordic-capital-buys-sic-processing
                    [2] => PEHub Media
                    [3] => Business
                    [4] => completed
                    [5] => Nordic Capital has acquired a 70% stake in SiC Processing AG, a German industrial recycling company, from Frog Capital. No sale price was disclosed.  SiC Processing’s founding family retains a 25% holding, while former lead investor Zouk Ventures retains a 5% stake.

                    [6] => Admin, China, Frog Capital, Germany, Italy, Iyad Omari, Manufacturing, Norway, PEHub Media, Photovoltaic Wafer Manufacturing, Renewable Energy, Semiconductor, United States
                )

        )

)

echo json_encode($myArr);

2010-06-21/nordic-capital-buys-sic-processing"，{"sEcho":"1“、"iTotalRecords":7521、"iTotalDisplayRecords":"1”、"aaData":[“北欧资本购买SiC Processing”、"PEHub Media“、"Business”、"completed“、null、”Admin“、中国、Frog Capital、德国、意大利、Iyad Omari、制造业、挪威、PEHub媒体、光华制造、可再生能源、半导体、美国)}

注意到完成后字符串中间的null

为什么，我需要执行哪些转义/操作才能对其进行编码？

我试过了，addslashes

Answer 1

从手册中：

注意，如果您试图对包含非utf值的数组进行编码，您将在生成的JSON字符串中获得空值。可以使用array_map函数对数组的所有元素进行批处理编码：

$encodedArray = array_map(utf8_encode, $myArr);
echo json_encode($encodedArray);

Answer 2

实际上，它不返回null，http://codepad.org/A34KdUf5。

也许您的PHP版本不支持json_encode()。

Answer 3

5.2.13为我工作。确保您至少使用了PHP5.2.0，并且PHP不是用-禁用-json编译的。还可以检查是否启用了错误报告(和/或日志记录)。