$re = '/# Clipping Rectangle
(?<x>\b[-0-9\.]+\b)(\s)
(?<y>\b[-0-9\.]+\b)(\s)
(?<width>\b[-0-9\.]+\b)(\s)
(?<height>\b[-0-9\.]+\b)(\s)
(re\nW)
(.*?)
# Text
(BT)
(?<text>.*?)
(ET)/xs';
$str = '---
---
85.039 42.52 42.519 42.52 re
W--
---
---
127.559 42.52 42.519 42.52 re
W--
---
---
170.078 42.52 42.52 42.52 re
W--
---
---
BT
---
Text
---
ET
---
---
170.078 42.52 42.52 42.52 re
W--
---
---
127.559 42.52 42.519 42.52 re
W--
---
---
BT
---
Text
---
ET
---
---
170.078 42.52 42.52 42.52 re
W--
---
---
BT
---
Text
---
ET';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php