regex101: PCRE (Legacy) Match Workspace

<!--product_templatethe literal text <!--product_template (case sensitive)

.*?any character, repeated any number of times

<tablethe literal text <table (case sensitive)

.*?any character, repeated any number of times

the literal text  (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

s modifier: single line. Allows a dot to match line terminators

Search reference

Regular Expression

<!--product_template.*?<table.*?<!--end_product_template-->

New

<!--product_template this is some extra text -->
<table class='template'></table>
<!--end_product_template-->

non-commented text might exist in the document

<div>As will other tags</div>

<!--product_template this is some different extra text--><table class='template'></table><!--end_product_template-->

<!--product_template--><p><!--end_product_template-->

<!--product_template--><!--end_product_template-->

<!--product_template--><table class='template'></table><!--end_product_template-->