If we have a text like this:
[SYS 1]Page 1 from 2:[/SYS]
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard ...
[SYS 2]Page 2 from 2:[/SYS]
It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
How should I keep only text between [SYS] and [/SYS] tags? like this:
Page 1 from 2:
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard ...
Page 2 from 2:
It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
I think the following regex would find the text inside two tags without attributes:
/\[SYS\](.+?)\[\/SYS\]/
But how should I replace the entire element with the inner text (or any other string) for that tag?
Use the following expression:
\[SYS[^]]*\](.+?)\[/SYS\]
And replace with $1
, see a demo on regex101.com .
PHP
:
$regex = '~\\[SYS[^]]*\\](.+?)\\[/SYS\\]~'; $string = preg_replace($regex, '$1', $your_original_string);
See a demo for the complete code on ideone.com .
You can replace like so:
$re = "/\\[\\/?SYS(?:\\s\\d+)?\\]/";
$str = "[SYS 1]Page 1 from 2:[/SYS]";
echo preg_replace($re, "", $str)
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