在php中使用正则表达式在两个其他字符串之间找到一个字符串？

Question

Is there a function in php to search a string and find a sub string based on it being between two defined character sets?

I am trying to search through a few files using a php script and grab a string from them.

the string i need is a URL, each file has a string that looks like this with a different url inside

/A << /URI (https://www.website/custom_ url_per_file)
/S /URI >>    //an actual linebreak in the code

I have all the files opening in a foreach loop, so how can i extract the url between the 2 strings $a and $b?

$a = /A << /URI
$b = /S /URI >>  

Answer 1

<?php

$string = '/A << /URI (https://www.website/custom_ url_per_file)
/S /URI >>    //an actual linebreak in the code';

preg_match('#/A << /URI \(([^\)]+)\)\s+\/S /URI >>#', $string, $matches);

print_r($matches);

?>

will result to:

Array
(
[0] => /A << /URI (https://www.website/custom_ url_per_file)
/S /URI >>
[1] => https://www.website/custom_ url_per_file
)