PHP-查找两个正则表达式之间的子字符串

Question

我需要一个函数，该函数返回匹配任何内容的正则表达式与定界符之间的所有子字符串。

$str = "{random_one}[SUBSTRING1] blah blah blah {random_two}[SUBSTRING2] blah blah blah{random_one}[SUBSTRING3]";

$resultingArray = getSubstrings($str)

$resultingArray should result in:
array(
    [0]: "SUBSTRING1",
    [1]: "SUBSTRING2",
    [2]: "SUBSTRING3"
)

我一直在用正则表达式弄乱，没有运气。 任何帮助将不胜感激！

Answer 1

您可以使用以下正则表达式来实现：

/{.+?}\[(.+?)\]/i

细节

{.+?}   # anything between curly brackets, one or more times, ungreedily
\[      # a bracket, literally
(.+?)   # anything one or more times, ungreedily. This is your capturing group - what you're after
\]      # close bracket, literally
i       # flag for case insensitivity

在PHP中，它看起来像这样：

<?php
$string = "{random_one}[SUBSTRING1] blah [SUBSTRINGX] blah blah {random_two}[SUBSTRING2] blah blah blah{random_one}[SUBSTRING3]";
preg_match_all("/{.+?}\[(.+?)\]/i", $string, $matches);
var_dump($matches[1]);

演示