如何在php中解析name = value对？什么是至少令人满意的方法？

Question

令人满意的是，不会进入耗费大量时间的函数中。

数据的格式:它基本上类似于HTML标签参数，但不完全是。

<name1=value1 name2=value2 [here can be any whitespace characters]
33=55 "name with spaces and ="="value with spaces and '" '"title"'="can't" "in
names"="and
values can be tabs and new lines"
double"and_single'quotes=are_allowed_in_names_and_values_if_there_is_no_whitespace_in_it
"escaping is ""sql-like"""='the same with ''single quotes'''
`third option`=`are "backticks" that also can be ``escaped```>

这种格式是以某种方式被调用的吗？我自己“发明”了它，但我非常怀疑之前没有人想出这个主意，也许它(或者非常相似的格式，例如斜杠转义)已经在php中有了解析功能？

如果没有，怎么写我自己的，使用正则表达式，字符串操作，某种缓冲区，累加器？我自己还从来没有写过任何解析器。

Answer 1

尝试如下所示：

$in = <<<BLOCK
name1=value1 

name2=value2 [here can be any whitespace characters]

33=55 

"name with spaces and ="="value with spaces and '" 

'"title"'="can't" 

"in names"="and
  values can be tabs and new lines"

double"and_single'quotes=are_allowed_in_names_and_values_if_there_is_no_whitespace_in_it

"escaping is ""sql-like"""='the same with ''single quotes'''

`third option`=`are "backticks" that also can be ``escaped```
BLOCK;

$string = "(?:                    # open non-capture group
             \"(?:\"\"|[^\"])+\"  # match a double quoted string
           | '(?:''|[^'])+'       # OR match a single quoted string
           | `(?:``|[^`])+`       # OR match a back-ticked string
           )                      # close non-capture group
          ";

$key    = "(                      # start capture group 1
             $string              # match any string
           | [^=\s]+              # OR match one or more chars other than '=' and space-chars
           )                      # end capture group 1
          ";

$value  = "(                      # start capture group 2
             $string              # match any string
           | [^\r\n]+             # OR match one or more chars other than '=' and space-chars
           )                      # end capture group 2
          ";

$regex = "/$key=$value/x"; // combine the patterns

preg_match_all($regex, $in, $matches);

$key_value_pairs = sizeof($matches[0]);

for($index = 0; $index < $key_value_pairs; $index++) {
  echo "===============================================\n" . 
       "KEY:\n" . $matches[1][$index] . "\n" .
       "VALUE:\n" . $matches[2][$index] . "\n";
}

它将打印以下内容：

===============================================
KEY:
name1
VALUE:
value1 
===============================================
KEY:
name2
VALUE:
value2 [here can be any whitespace characters]
===============================================
KEY:
33
VALUE:
55 
===============================================
KEY:
"name with spaces and ="
VALUE:
"value with spaces and '"
===============================================
KEY:
'"title"'
VALUE:
"can't"
===============================================
KEY:
"in names"
VALUE:
"and
  values can be tabs and new lines"
===============================================
KEY:
double"and_single'quotes
VALUE:
are_allowed_in_names_and_values_if_there_is_no_whitespace_in_it
===============================================
KEY:
"escaping is ""sql-like"""
VALUE:
'the same with ''single quotes'''
===============================================
KEY:
`third option`
VALUE:
`are "backticks" that also can be ``escaped```

使用和维护，风险自负！

Answer 2

XML允许名称中包含空格的示例

<item>
 <name>name with spaces</name>
 <value>
   value with spaces
   and linebreaks
 </value>
</item>