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
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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"
)
Online regex demo
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
学分
向Bart Kiers 求助于他的递归模式以匹配嵌套括号。
建议
您可能应该使用解析器，因为正则表达式很敏感。@bwoebi在他的回答中做得很好。