Question

除了大括号内的另一个大括号外，我想用括号内的逗号分隔

$q1 ="CREATE TABLE notes(id INTEGER,code DECIMAL (4,2),PRIMARY KEY (id))";
$q2 ="CREATE TABLE notes(id INTEGER,code TEXT)";

$r = preg_split('/\([^()]*\)(*SKIP)(*F)|[()]|,/', $q1);//$q1 splitted but $q2 no
print_r($r);

最终结果应为：

for $ q1：

   array(
         0 => id INTEGER
         1 => code DECIMAL (4,2)
         2 => PRIMARY KEY (id)
   );

for $ q2：

   array(
        0 => id INTEGER
        1 => code TEXT
   );

Answer 1

代码：（PHP Demo）

IntentService

输出：

$('form[name="paypal"]').submit(function () {
    if (invalid) {
        alert("Some of the fields are not valid.");
        return false;
    }
    return true;
});

正则表达式细分：（Regex Demo）

$sqls = array(
    "CREATE TABLE notes(id INTEGER,code DECIMAL (4,2),PRIMARY KEY (id))",
    "CREATE TABLE notes(id INTEGER,code TEXT)"
);

foreach($sqls as $sql){
    if(preg_match_all("/(?:^.+?\(|,)(?:\K[\w ]+(?:\([\S].*?\))?)/", $sql,$matches)){
        echo "<pre>";
            var_export($matches[0]);
        echo "</pre>";
    }
}

使用// first $matches... array( 0 => 'id INTEGER', 1 => 'code DECIMAL (4,2)', 2 => 'PRIMARY KEY (id)' ) // second $matches... array( 0 => 'id INTEGER', 1 => 'code TEXT' )允许排除捕获组，(?:^.+?$|,) #group everything from the start to 1st parenthesis or a comma (?:\K[\w ]+ #\K means "only retain text from this point", group words and spaces (?:\([\S].*?$)? #optionally group parenthetical text )在第一个子阵列中返回所需的字符串（完整字符串）。好处是\K数组，其大小是具有捕获组的数组的一半。

Answer 2

如果embeded括号仅包含数字，则执行以下操作：

$sqls = array(
"CREATE TABLE notes(id INTEGER,code DECIMAL (4,2),PRIMARY KEY (id))",
"CREATE TABLE notes(id INTEGER,code TEXT)"
);

foreach ($sqls as $sql) {
    $arr = preg_split("/(?<!\d)[(),](?!\d)/", $sql);
    print_r($arr);
}

<强>输出：

Array
(
    [0] => CREATE TABLE notes
    [1] => id INTEGER
    [2] => code DECIMAL (4,2)
    [3] => PRIMARY KEY 
    [4] => id
    [5] => 
    [6] => 
)
Array
(
    [0] => CREATE TABLE notes
    [1] => id INTEGER
    [2] => code TEXT
    [3] => 
)

除了括号内的另一个括号外，用括号内的逗号分隔

2 个答案: