php - 部分提取 php 代码的正则表达式((数组定义))

Question

我将 php 代码((数组定义))存储在这样的字符串中

$code=' array(

  0  => "a",
 "a" => $GlobalScopeVar,
 "b" => array("nested"=>array(1,2,3)),  
 "c" => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; },

); ';

有一个正则表达式来提取这个数组??，我的意思是我想要类似的东西

$array=(  

  0  => '"a"',
 'a' => '$GlobalScopeVar',
 'b' => 'array("nested"=>array(1,2,3))',
 'c' => 'function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }',

);

---

pD::我进行了研究，试图找到一个正则表达式，但什么也没找到。
pD2::stackoverflow 的众神，现在让我赏金，我将提供 400 :3
pD3::这将在内部应用程序中使用，我需要在其中提取一些 php 文件的数组以进行部分“处理”，我尝试用这个 codepad.org/td6LVVme 来解释

Answer 1

正则表达式

所以这是我想出的 MEGA 正则表达式:

\s*                                     # white spaces
########################## KEYS START ##########################
(?:                                     # We\'ll use this to make keys optional
(?P<keys>                               # named group: keys
\d+                                     # match digits
|                                       # or
"(?(?=\\\\")..|[^"])*"                  # match string between "", works even 4 escaped ones "hello \" world"
|                                       # or
\'(?(?=\\\\\')..|[^\'])*\'              # match string between \'\', same as above :p
|                                       # or
\$\w+(?:\[(?:[^[\]]|(?R))*\])*          # match variables $_POST, $var, $var["foo"], $var["foo"]["bar"], $foo[$bar["fail"]]
)                                       # close group: keys
########################## KEYS END ##########################
\s*                                     # white spaces
=>                                      # match =>
)?                                      # make keys optional
\s*                                     # white spaces
########################## VALUES START ##########################
(?P<values>                             # named group: values
\d+                                     # match digits
|                                       # or
"(?(?=\\\\")..|[^"])*"                  # match string between "", works even 4 escaped ones "hello \" world"
|                                       # or
\'(?(?=\\\\\')..|[^\'])*\'              # match string between \'\', same as above :p
|                                       # or
\$\w+(?:\[(?:[^[\]]|(?R))*\])*          # match variables $_POST, $var, $var["foo"], $var["foo"]["bar"], $foo[$bar["fail"]]
|                                       # or
array\s*\((?:[^()]|(?R))*\)             # match an array()
|                                       # or
\[(?:[^[\]]|(?R))*\]                    # match an array, new PHP array syntax: [1, 3, 5] is the same as array(1,3,5)
|                                       # or
(?:function\s+)?\w+\s*                  # match functions: helloWorld, function name
(?:\((?:[^()]|(?R))*\))                 # match function parameters (wut), (), (array(1,2,4))
(?:(?:\s*use\s*\((?:[^()]|(?R))*\)\s*)? # match use(&$var), use($foo, $bar) (optionally)
\{(?:[^{}]|(?R))*\}                     # match { whatever}
)?;?                                    # match ; (optionally)
)                                       # close group: values
########################## VALUES END ##########################
\s*                                     # white spaces

我已经添加了一些注释，请注意您需要使用 3 个修饰符:
x : 让我发表评论s :用点匹配换行符i : 不区分大小写匹配

PHP

$code='array(0  => "a", 123 => 123, $_POST["hello"][\'world\'] => array("is", "actually", "An array !"), 1234, \'got problem ?\', 
 "a" => $GlobalScopeVar, $test_further => function test($noway){echo "this works too !!!";}, "yellow" => "blue",
 "b" => array("nested"=>array(1,2,3), "nested"=>array(1,2,3),"nested"=>array(1,2,3)), "c" => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }
  "bug", "fixed", "mwahahahaa" => "Yeaaaah"
);'; // Sample data

$code = preg_replace('#(^\s*array\s*\(\s*)|(\s*\)\s*;?\s*$)#s', '', $code); // Just to get ride of array( at the beginning, and ); at the end

preg_match_all('~
\s*                                     # white spaces
########################## KEYS START ##########################
(?:                                     # We\'ll use this to make keys optional
(?P<keys>                               # named group: keys
\d+                                     # match digits
|                                       # or
"(?(?=\\\\")..|[^"])*"                  # match string between "", works even 4 escaped ones "hello \" world"
|                                       # or
\'(?(?=\\\\\')..|[^\'])*\'              # match string between \'\', same as above :p
|                                       # or
\$\w+(?:\[(?:[^[\]]|(?R))*\])*          # match variables $_POST, $var, $var["foo"], $var["foo"]["bar"], $foo[$bar["fail"]]
)                                       # close group: keys
########################## KEYS END ##########################
\s*                                     # white spaces
=>                                      # match =>
)?                                      # make keys optional
\s*                                     # white spaces
########################## VALUES START ##########################
(?P<values>                             # named group: values
\d+                                     # match digits
|                                       # or
"(?(?=\\\\")..|[^"])*"                  # match string between "", works even 4 escaped ones "hello \" world"
|                                       # or
\'(?(?=\\\\\')..|[^\'])*\'              # match string between \'\', same as above :p
|                                       # or
\$\w+(?:\[(?:[^[\]]|(?R))*\])*          # match variables $_POST, $var, $var["foo"], $var["foo"]["bar"], $foo[$bar["fail"]]
|                                       # or
array\s*\((?:[^()]|(?R))*\)             # match an array()
|                                       # or
\[(?:[^[\]]|(?R))*\]                    # match an array, new PHP array syntax: [1, 3, 5] is the same as array(1,3,5)
|                                       # or
(?:function\s+)?\w+\s*                  # match functions: helloWorld, function name
(?:\((?:[^()]|(?R))*\))                 # match function parameters (wut), (), (array(1,2,4))
(?:(?:\s*use\s*\((?:[^()]|(?R))*\)\s*)? # match use(&$var), use($foo, $bar) (optionally)
\{(?:[^{}]|(?R))*\}                     # match { whatever}
)?;?                                    # match ; (optionally)
)                                       # close group: values
########################## VALUES END ##########################
\s*                                     # white spaces
~xsi', $code, $m); // Matching :p

print_r($m['keys']); // Print keys
print_r($m['values']); // Print values


// Since some keys may be empty in case you didn't specify them in the array, let's fill them up !
foreach($m['keys'] as $index => &$key){
    if($key === ''){
        $key = 'made_up_index_'.$index;
    }
}
$results = array_combine($m['keys'], $m['values']);
print_r($results); // printing results

输出

Array
(
    [0] => 0
    [1] => 123
    [2] => $_POST["hello"]['world']
    [3] => 
    [4] => 
    [5] => "a"
    [6] => $test_further
    [7] => "yellow"
    [8] => "b"
    [9] => "c"
    [10] => 
    [11] => 
    [12] => "mwahahahaa"
    [13] => "this is"
)
Array
(
    [0] => "a"
    [1] => 123
    [2] => array("is", "actually", "An array !")
    [3] => 1234
    [4] => 'got problem ?'
    [5] => $GlobalScopeVar
    [6] => function test($noway){echo "this works too !!!";}
    [7] => "blue"
    [8] => array("nested"=>array(1,2,3), "nested"=>array(1,2,3),"nested"=>array(1,2,3))
    [9] => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }
    [10] => "bug"
    [11] => "fixed"
    [12] => "Yeaaaah"
    [13] => "a test"
)
Array
(
    [0] => "a"
    [123] => 123
    [$_POST["hello"]['world']] => array("is", "actually", "An array !")
    [made_up_index_3] => 1234
    [made_up_index_4] => 'got problem ?'
    ["a"] => $GlobalScopeVar
    [$test_further] => function test($noway){echo "this works too !!!";}
    ["yellow"] => "blue"
    ["b"] => array("nested"=>array(1,2,3), "nested"=>array(1,2,3),"nested"=>array(1,2,3))
    ["c"] => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }
    [made_up_index_10] => "bug"
    [made_up_index_11] => "fixed"
    ["mwahahahaa"] => "Yeaaaah"
    ["this is"] => "a test"
)

<知识库> Online regex demo <知识库> Online php demo

已知错误(已修复)

    $code='array("aaa", "sdsd" => "dsdsd");'; // fail
    $code='array(\'aaa\', \'sdsd\' => "dsdsd");'; // fail
    $code='array("aaa", \'sdsd\' => "dsdsd");'; // succeed
    // Which means, if a value with no keys is followed
    // by key => value and they are using the same quotation
    // then it will fail (first value gets merged with the key)

Online bug demo

致谢

转到 Bart Kiers为他的recursive pattern匹配嵌套的括号。

建议

您可能应该使用解析器，因为正则表达式很敏感。 @bwoebi在他的answer 中做得很好.