PHP下處理YAML

用PHP處理YAML，經常使用的方法有兩種：

1. PECL擴展YAML
2. spyc

PECL擴展須要PHP 5.2以上，SPYC 須要PHP 5.3以上。

我我的傾向於SPYC，由於PECL還須要編譯安裝，有的時候不方便（好比虛擬主機空間什麼的），SPYC 雖然不支持 PHP 5.2，但5.2官方也不支持了，因此也不算什麼不足。

1 PECL擴展YAML

安裝

標準的PECL安裝步驟，這裏就不羅嗦了。

代碼例子

假設咱們有這樣一個數組：

$addr = array(
    "given" => "Chris",
    "family"=> "Dumars",
    "address"=> array(
        "lines"=> "458 Walkman Dr.
        Suite #292",
        "city"=> "Royal Oak",
        "state"=> "MI",
        "postal"=> 48046,
      ),
  );
$invoice = array (
    "invoice"=> 34843,
    "date"=> "2001-01-23",
    "bill-to"=> $addr,
    "ship-to"=> $addr,
    "product"=> array(
        array(
            "sku"=> "BL394D",
            "quantity"=> 4,
            "description"=> "Basketball",
            "price"=> 450,
          ),
        array(
            "sku"=> "BL4438H",
            "quantity"=> 1,
            "description"=> "Super Hoop",
            "price"=> 2392,
          ),
      ),
    "tax"=> 251.42,
    "total"=> 4443.52,
    "comments"=> "Late afternoon is best. Backup contact is Nancy Billsmer @ 338-4338.",
    );

使用yaml_emit能夠將其轉化成YAML

$yaml = yaml_emit($invoice);

使用yaml_parse解析YAML：

$parsed = yaml_parse($yaml);

2 使用spyc

安裝

能夠使用Composer安裝，固然也能夠直接require_once或include.

代碼示例

生成YAML：

<?php
$array[] = 'Sequence item';
$array['The Key'] = 'Mapped value';
$array[] = array('A sequence','of a sequence');
$array[] = array('first' => 'A sequence','second' => 'of mapped values');
$array['Mapped'] = array('A sequence','which is mapped');
$array['A Note'] = 'What if your text is too long?';
$array['Another Note'] = 'If that is the case, the dumper will probably fold your text by using a block.  Kinda like this.';
$array['The trick?'] = 'The trick is that we overrode the default indent, 2, to 4 and the default wordwrap, 40, to 60.';
$array['Old Dog'] = "And if you want\n to preserve line breaks, \ngo ahead!";
$array['key:withcolon'] = "Should support this to";

$yaml = Spyc::YAMLDump($array,4,60);

解析YAML:

<?php
$Data = Spyc::YAMLLoad('spyc.yaml');

解析更經常使用，因此還提供了函數，上面的語句等價於：

<?php
$Data = spyc_load_file('spyc.yaml');