我将php代码存储在这样的字符串中((数组定义((
$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 ：： 我做研究试图找到一个正则表达式，但什么也没找到。
pD2 ：： 堆栈溢出之神，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，我需要提取一些 PHP 文件的数组以部分"处理"，我尝试用这个 codepad.org/td6LVVme 解释
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
我做了一些评论，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：匹配不区分大小写
.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"
)
在线正则表达式演示 在线 php 演示
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)
在线错误演示
学分
转到 Bart Kiers 以获取他的递归模式以匹配嵌套括号。
建议
你也许应该使用解析器，因为正则表达式很敏感。 @bwoebi在他的回答中做得很好。
即使你要求正则表达式，它也适用于纯PHP。 token_get_all是这里的关键功能。对于正则表达式，请查看@HamZa的答案。
这里的优点是它比正则表达式更具动态性。正则表达式具有静态模式，而使用 token_get_all，您可以在每个令牌之后决定要做什么。它甚至在必要时转义单引号和反斜杠，这是正则表达式不会做的。
此外，在正则表达式中，即使被注释，你也有问题来想象它应该做什么;当你查看PHP代码时，代码的作用更容易理解。
$code = ' array(
0 => "a",
"a" => $GlobalScopeVar,
"b" => array("nested"=>array(1,2,3)),
"c" => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; },
"string_literal",
12345
); ';
$token = token_get_all("<?php ".$code);
$newcode = "";
$i = 0;
while (++$i < count($token)) { // enter into array; then start.
if (is_array($token[$i]))
$newcode .= $token[$i][1];
else
$newcode .= $token[$i];
if ($token[$i] == "(") {
$ending = ")";
break;
}
if ($token[$i] == "[") {
$ending = "]";
break;
}
}
// init variables
$escape = 0;
$wait_for_non_whitespace = 0;
$parenthesis_count = 0;
$entry = "";
// main loop
while (++$i < count($token)) {
// don't match commas in func($a, $b)
if ($token[$i] == "(" || $token[$i] == "{") // ( -> normal parenthesis; { -> closures
$parenthesis_count++;
if ($token[$i] == ")" || $token[$i] == "}")
$parenthesis_count--;
// begin new string after T_DOUBLE_ARROW
if (!$escape && $wait_for_non_whitespace && (!is_array($token[$i]) || $token[$i][0] != T_WHITESPACE)) {
$escape = 1;
$wait_for_non_whitespace = 0;
$entry .= "'";
}
// here is a T_DOUBLE_ARROW, there will be a string after this
if (is_array($token[$i]) && $token[$i][0] == T_DOUBLE_ARROW && !$escape) {
$wait_for_non_whitespace = 1;
}
// entry ended: comma reached
if (!$parenthesis_count && $token[$i] == "," || ($parenthesis_count == -1 && $token[$i] == ")" && $ending == ")") || ($ending == "]" && $token[$i] == "]")) {
// go back to the first non-whitespace
$whitespaces = "";
if ($parenthesis_count == -1 || ($ending == "]" && $token[$i] == "]")) {
$cut_at = strlen($entry);
while ($cut_at && ord($entry[--$cut_at]) <= 0x20); // 0x20 == " "
$whitespaces = substr($entry, $cut_at + 1, strlen($entry));
$entry = substr($entry, 0, $cut_at + 1);
}
// $escape == true means: there was somewhere a T_DOUBLE_ARROW
if ($escape) {
$escape = 0;
$newcode .= $entry."'";
} else {
$newcode .= "'".addcslashes($entry, "'''")."'";
}
$newcode .= $whitespaces.($parenthesis_count?")":(($ending == "]" && $token[$i] == "]")?"]":","));
// reset
$entry = "";
} else {
// add actual token to $entry
if (is_array($token[$i])) {
$addChar = $token[$i][1];
} else {
$addChar = $token[$i];
}
if ($entry == "" && $token[$i][0] == T_WHITESPACE) {
$newcode .= $addChar;
} else {
$entry .= $escape?str_replace(array("'", "''"), array("'''", "''''"), $addChar):$addChar;
}
}
}
//append remaining chars like whitespaces or ;
$newcode .= $entry;
print $newcode;
演示位置：http://3v4l.org/qe4Q1
应输出：
array(
0 => '"a"',
"a" => '$GlobalScopeVar',
"b" => 'array("nested"=>array(1,2,3))',
"c" => 'function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }',
'"string_literal"',
'12345'
)
您可以获取数组的数据，print_r(eval("return $newcode;"));获取数组的条目：
Array
(
[0] => "a"
[a] => $GlobalScopeVar
[b] => array("nested"=>array(1,2,3))
[c] => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }
[1] => "string_literal"
[2] => 12345
)
这样做的干净方法显然是使用分词器(但请记住，仅分词器并不能解决问题(。
对于挑战，我打算采用正则表达式方法。
这个想法不是描述PHP语法，而是更多地以负面的方式描述它(换句话说，我只描述基本和所需的PHP结构来获得结果(。这种基本描述的优点是处理比函数、字符串、整数或布尔值更复杂的对象。结果是一个更灵活的模式，可以处理多行/单行注释，heredoc/nowdoc语法：
<pre><?php
$code=' array(
0 => "a",
"a" => $GlobalScopeVar,
"b" => array("nested"=>array(1,2,3)),
"c" => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; },
); ';
$pattern = <<<'EOD'
~
# elements
(?(DEFINE)
# comments
(?<comMulti> /'* .*? (?:'*/|'z) ) # multiline comment
(?<comInlin> (?://|'#) 'N* $ ) # inline comment
(?<comments> 'g<comMulti> | 'g<comInlin> )
# strings
(?<strDQ> " (?>[^"'']+|''.)* ") # double quote string
(?<strSQ> ' (?>[^''']+|''.)* ') # single quote string
(?<strHND> <<<(["']?)([a-zA-Z]'w*)'g{-2} (?>'R 'N*)*? 'R 'g{-1} ;? (?='R|$) ) # heredoc and nowdoc syntax
(?<string> 'g<strDQ> | 'g<strSQ> | 'g<strHND> )
# brackets
(?<braCrl> { (?> 'g<nobracket> | 'g<brackets> )* } )
(?<braRnd> '( (?> 'g<nobracket> | 'g<brackets> )* ') )
(?<braSqr> '[ (?> 'g<nobracket> | 'g<brackets> )* ] )
(?<brackets> 'g<braCrl> | 'g<braRnd> | 'g<braSqr> )
# nobracket: content between brackets except other brackets
(?<nobracket> (?> [^][)(}{"'</'#]+ | 'g<comments> | / | 'g<string> | <+ )+ )
# ignored elements
(?<s> 's+ | 'g<comments> )
)
# array components
(?(DEFINE)
# key
(?<key> [0-9]+ | 'g<string> )
# value
(?<value> (?> [^][)(}{"'</'#,'s]+ | 'g<s> | / | 'g<string> | <+ | 'g<brackets> )+? (?='g<s>*[,)]) )
)
(?J)
(?: 'G (?!'A)(?<!')) | array 'g<s>* '( ) 'g<s>* 'K
(?: (?<key> 'g<key> ) 'g<s>* => 'g<s>* )? (?<value> 'g<value> ) 'g<s>* (?:,|,?'g<s>*(?<stop> ') ))
~xsm
EOD;
if (preg_match_all($pattern, $code, $m, PREG_SET_ORDER)) {
foreach($m as $v) {
echo "'n<strong>Whole match:</strong> " . $v[0]
. "'n<strong>Key</strong>:'t" . $v['key']
. "'n<strong>Value</strong>:'t" . $v['value'] . "'n";
if (isset($v['stop']))
echo "'n<strong>done</strong>'n'n";
}
}
这是你要求的，非常紧凑。如果您想进行任何调整，请告诉我。
代码(你可以直接在 php 中运行它(
$code=' array(
0 => "a",
"a" => $GlobalScopeVar,
"b" => array("nested"=>array(1,2,3)),
"c" => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; },
); ';
$regex = "~(?xm)
^['s''"]*([^''"'s]+)[''"'s]*
=>'s*+
(.*?)'s*,?'s*$~";
if(preg_match_all($regex,$code,$matches,PREG_SET_ORDER)) {
$array=array();
foreach($matches as $match) {
$array[$match[1]] = $match[2];
}
echo "<pre>";
print_r($array);
echo "</pre>";
} // END IF
输出
Array
(
[0] => "a"
[a] => $GlobalScopeVar
[b] => array("nested"=>array(1,2,3))
[c] => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }
)
$array包含您的数组。
你喜欢？
如果您有任何问题或需要调整，请告诉我。 :)
仅针对这种情况：
$code=' array(
0=>"a",
"a"=>$GlobalScopeVar,
"b"=>array("nested"=>array(1,2,3)),
"c"=>function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; },
); ';
preg_match_all('#'s*(.*?)'s*=>'s*(.*?)'s*,?'s*$#m', $code, $m);
$array = array_combine($m[1], $m[2]);
print_r($array);
输出：
Array
(
[0] => "a"
["a"] => $GlobalScopeVar
["b"] => array("nested"=>array(1,2,3))
["c"] => function() use (&$VAR) { return isset($VAR) ? "defined" : "undefined" ; }
)