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// Replace everything between double quotes
// Example: title="Lorem Ipsum" will return title=""
title="[^"]*"

// Replace everything between style tags
(?s)<style(.*?)</style>

// Replace everything between HTML tags (<pre> in this example)
(?<=(<pre>))(\w|\d|\n|[().,\-:;@#$%^&*\[\]"'+–/\/®°⁰!?{}|`~]| )+?(?=(</pre>))

// Replace everything between brackets (parenthesis)
\([^)]*\)

// remove script tags
<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>

// Replace part of the string
// Example: SET `id` = 198545,`introtext` will return SET `id` = ,`introtext`
SET `id` = (.*?),`introtext`

// Find termination character (\0) in mysql table
select * from TABLE where COLUMN like '%\0%';

<div([\s\S]*?)> matches the div start tag, even if the tag spans several lines.