Quick way to sanitize markdown in PHP
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PHP Markdown XSS Sanitizer
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how to replace special characters with the ones they're based on in PHP?
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Minify / Obfuscate PHP Code
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Remove everything except letters from PHP string
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Disabling Strict Standards in PHP 5.4
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How to prevent US post code formats
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Is there any way to put malicious code into a regular expression?
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PHP - Get rid of notation
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"Black marker" effect in the text (sanitization used to hide passwords in code example)
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What are the best PHP input sanitizing functions?
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Sanitize/Rewrite HTML on the Client Side
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How do I safely "eval" user code in a webpage?
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Why can't markdown used by Stack Exchange properly render a backward slash?
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Sanitizing global string attributes - necessary or not?
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Regex/ code to fix corrupt serialized PHP data.
53323
How do I escape a backtick ` within in-line code in Markdown?
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Best solution to protect PHP code without encryption