Fatal error: Uncaught Error: Call to undefined function mb_strlen() Referrer

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https://khanacademy.org/

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uid: 6EyPG
insdate: 2025-09-12 13:56:46
title: Fatal error: Uncaught Error: Call to undefined function mb_strlen() Referrer
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url: https://khanacademy.org/
linked_class: code
linked_uid: nr9G0
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md5: a9abfd1aa016649751320b70025c8136

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Welcome

This is my test area for webdev. I keep a collection of code here, mostly for my reference. Also if i find a good link, i usually add it here and then forget about it. more...

You could also follow me on twitter. I have a couple of youtube channels if you want to see some video related content. RuneScape 3, Minecraft and also a coding channel here Web Dev.

If you found something useful or like my work, you can buy me a coffee here. Mmm Coffee. ☕

❤️👩‍💻🎮

🪦 2000 - 16 Oct 2022 - Boots
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"Let us prepare our minds as if we'd come to the very end of life. Let us postpone nothing. Let us balance life's books each day ... The one who puts the finishing touches on their life each day is never short of time."
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appearance (-moz-appearance, -webkit-appearance)

The appearance CSS property is used to display an element using platform-native styling, based on the operating system's theme. The -moz-appearance and -webkit-appearance properties are non-standard versions of this property, used (respectively) by Gecko (Firefox) and by WebKit-based (e.g., Safari) and Blink-based (e.g., Chrome, Opera) browsers to achieve the same thing. Note that Firefox and Edge also support -webkit-appearance, for compatibility reasons.
appearance css reference