https ipcrs.pbccrc.org.cn php json and array conversion

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Release: 2016-07-29 08:40:16
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1. Convert the array into a json string: json_encode($arr [,$opti//$options are optional parameters, the default is 0

Generally speaking, use json_encode($arr). But when there is When there are special needs, for example, the data contains the absolute path of the file, such as "/da1/test/123.php", direct json_encode will escape the forward slash "/" into "/",

At this time, you need to add special parameters Now in the options, the options optional parameters are as follows:

JSON_HEX_TAG (integer)
所有 < 和 > 转义成 \u003C 和 \u003E。 

JSON_HEX_AMP (integer)
所有 & 转义成 \u0026。

JSON_HEX_APOS (integer)
所有 ' 转义成 \u0027。 

JSON_HEX_QUOT (integer)
所有 " 转义成 \u0022。 

JSON_FORCE_OBJECT (integer)
使一个非关联数组输出一个类(Object)而非数组。 在数组为空并且接受者需要一个类(Object)的时候尤其有用。 

JSON_NUMERIC_CHECK (integer)
将所有数字字符串编码成数字(numbers),例如“1”编译成 1
JSON_BIGINT_AS_STRING (integer)将大数字编码成原始字符原来的值。 
JSON_PRETTY_PRINT (integer)
用空白字符格式化返回的数据。使其更加美观

JSON_UNESCAPED_SLASHES (integer)
不要转义 /,不加这个option会把“/”转义成“\/” 

JSON_UNESCAPED_UNICODE (integer)
以字面编码多字节 Unicode 字符(默认是编码成 \uXXXX)。
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2. Change the json string into an array: json_decode($json_str[,assoc=false]);/$json_str is the corresponding json string, and assoc is Optional parameters, the default is false

The optional parameters are as follows:

assoc为false时,json_decode会返回一个对象(object),而非数组,可以通过$obj->attr;的方式访问对象$obj中名为attr的属性。
assoc为true时,json_decode返回一个数组(array),可以通过array[key]的方式访问数组array中对应键为key的值
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