Php 正则表达式匹配三个引号字符串

我有以下字符串（如python文档）：

我需要：

array(
[0] => 1 string with two lines
    in this area

[1] => 2 string, but with more "quotes"
[2] => 3 string
    multiline and "multiquote"

)

但是，我有：

/(?<!""")(?<=(?!""").)"(?!""")/im 

看到这个了吗

看到这个了吗

---

你为什么不这样编码呢

$re = '/"""(.*?)"""/is'; 
$str = '"""
1 string with two lines
in this area
"""
"""
2 string, but with more "quotes"
"""
"""
3 string
multiline and "multiquote"
"""'; 

preg_match_all($re, $str, $matches);
echo "<pre>";
print_r($matches[1]);

output:

Array
(
    [0] => 
1 string with two lines
in this area

    [1] => 
2 string, but with more "quotes"

    [2] => 
3 string
multiline and "multiquote"

)

$re='/''（.*）“/is'；
$str='“”“
1个带两行的字符串
在这个地区
"""
"""
2个字符串，但带有更多“引号”
"""
"""
3串
多行和“多引号”
"""'; 
预匹配全部（$re，$str，$MATCHS）；
回声“；
打印（$matches[1]）；
输出：
大堆
(
[0] => 
1个带两行的字符串
在这个地区
[1] => 
2个字符串，但带有更多“引号”
[2] => 
3串
多行和“多引号”
)
为什么不这样编码呢

$re = '/"""(.*?)"""/is'; 
$str = '"""
1 string with two lines
in this area
"""
"""
2 string, but with more "quotes"
"""
"""
3 string
multiline and "multiquote"
"""'; 

preg_match_all($re, $str, $matches);
echo "<pre>";
print_r($matches[1]);

output:

Array
(
    [0] => 
1 string with two lines
in this area

    [1] => 
2 string, but with more "quotes"

    [2] => 
3 string
multiline and "multiquote"

)

$re='/''（.*）“/is'；
$str='“”“
1个带两行的字符串
在这个地区
"""
"""
2个字符串，但带有更多“引号”
"""
"""
3串
多行和“多引号”
"""'; 
预匹配全部（$re，$str，$MATCHS）；
回声“；
打印（$matches[1]）；
输出：
大堆
(
[0] => 
1个带两行的字符串
在这个地区
[1] => 
2个字符串，但带有更多“引号”
[2] => 
3串
多行和“多引号”
)

preg_match_all("/\"{3}(.*?)\"{3}/s", $str, $matches);

$re = '/"""(.*?)"""/is'; 
$str = '"""
1 string with two lines
in this area
"""
"""
2 string, but with more "quotes"
"""
"""
3 string
multiline and "multiquote"
"""'; 

preg_match_all($re, $str, $matches);
echo "<pre>";
print_r($matches[1]);

output:

Array
(
    [0] => 
1 string with two lines
in this area

    [1] => 
2 string, but with more "quotes"

    [2] => 
3 string
multiline and "multiquote"

)