php - 这是什么类型的对象以及如何使用它？

Question

这种数组的正确名称是什么？

有“issuedTime”“text”“url”和“validToTime”三个主要部分和4个子部分，你如何开始将它转换为一个对象？如果只有 1 个主要部分，那么做起来会相当简单，但是有 3 个主要部分，而且每个主要部分都没有标识，这让我不知从哪里开始。

感谢任何建议。

[{
"issuedTime":"7:13pm Sunday 13 June 2010",
"text":"\nAmended 7:10pm.\n\nText text and more text\n",
"url":"\/folder\/fc\/name.png",
"validToTime":"12:00am Monday 14 June 2010"
},{
"issuedTime":"8:33pm Sunday 13 June 2010",
"text":"\nText and more text.\n",
"url":"\/folder\/fc\/name.png",
"validToTime":"12:00pm Monday 14 June 2010"
},{
"issuedTime":"10:40am Sunday 13 June 2010",
"text":"\nAnd even more text.",
"url":"\/folder\/fc\/name.png",
"validToTime":"12:00am Tuesday 15 June 2010"
}
]

Answer 1

JSON (an acronym for JavaScript Object Notation) is a lightweight text-based open standard designed for human-readable data interchange. It is derived from the JavaScript programming language for representing simple data structures and associative arrays, called objects. Despite its relationship to JavaScript, it is language-independent, with parsers available for virtually every programming language.

您可以使用 json_decode 轻松将其转换为 php 数组 函数，这里是一个来自 php 网站的例子:

$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json, true));

结果:

array(5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}

json_decode 的第二个参数是是否应该将其转换为关联数组。如果你不指定第二个参数，输出将是这样的:

object(stdClass)#1 (5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}

因此，您可以将其转换为数组并像这样循环遍历它:

$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
$array = json_decode($json, true);
print_r($array);

foreach($array as $key => $value)
{
   // manipulate the var $value
}