Hi checked with bootstrap 4. Its working proper.Please find the below link
https://www.codeply.com/p?starter=Bootstrap%204
Paste your code and check its working as expected.
Notice on the<div id="collapseTwo">
thedata-parent
attribute is set to#accordion
? Be sure to set that attribute to the ID of whatever element contains the accordion, otherwise it will not work.
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PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/
Bootstrap is not exclusively a CSS framework, but its most popular features are CSS-centric. These include a powerful grid, icons, buttons, map components, navigation bars, and more.
https://getbootstrap.com/
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