README

这是一个用于 PHP 的 JSONPath 实现。

此实现包含规范中除 () 运算符外的所有元素（规范中有 $..a[(@.length-1)]，但可以使用 $..a[-1] 实现，后者更简单）。

除此之外，它还实现了一些扩展功能

• 正则表达式匹配比较（例如 $.store.book[?(@.author =~ /.*Tolkien/)]）
• 对于子运算符 []，不需要用引号包围子名称（例如 $.[store][book, bicycle]），除非字段名称不是有效的 JavaScript 变量名称。
• 可以使用 .length 来获取字符串的长度、获取数组的长度以及检查节点是否有子节点。

特性

此实现具有以下特性

• 使用 JSONPath 字符串集将 JSON 树转换为平面表格。

JSONPath 示例

考虑以下 JSON

{ "store": {
    "name":"My Store",
    "book": [
      { "category": "reference",
        "author": "Nigel Rees",
        "title": "Sayings of the Century",
        "price": 8.95,
        "available": true,
        "authors": ["Nigel Rees"]
      },
      { "category": "fiction",
        "author": "Evelyn Waugh",
        "title": "Sword of Honour",
        "price": 12.99,
        "available": false,
        "authors": []
      },
      { "category": "fiction",
        "author": "Herman Melville",
        "title": "Moby Dick",
        "isbn": "0-553-21311-3",
        "price": 8.99,
        "available": true,
        "authors": ["Nigel Rees"]
      },
      { "category": "fiction",
        "author": "J. R. R. Tolkien",
        "title": "The Lord of the Rings",
        "isbn": "0-395-19395-8",
        "price": 22.99,
        "available": false,
        "authors": ["Evelyn Waugh", "J. R. R. Tolkien"]
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 19.95,
      "available": true,
      "model": null,
      "sku-number": "BCCLE-0001-RD"
    },
    "bicycleSet": [{
      "color": "red",
      "price": 19.95,
      "available": true,
      "model": null,
      "sku-number": "BCCLE-0001-RD"
    },{
      "color": "green",
      "price": 19.75,
      "available": false,
      "model": null,
      "sku-number": "RCADF-0002-CQ"
    }]
  },
  "authors": [
    "Nigel Rees",
    "Evelyn Waugh",
    "Herman Melville",
    "J. R. R. Tolkien"
  ],
  "Bike models": [
    1,
    2,
    3
  ]
}

JSONPath => 结果

[$.store.bicycle.price]

[$.store.name,$.store.bicycle.price,$.store.bicycle.sku-number]

[$.store.book[*].price,$.store.book[*].price,$.store.book[*].authors[*],$.store.book[*].title,$.store.name]

使用方法

$json = '{... your json as string ...}';
$jsonPath = '[$.your.jsonpath.1,$.your.jsonpath.2]';

$jsonObject = new JsonObject($json);
$result = $jsonObject->getTable($jsonPath);