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HTTP 418: I'm a teapot

The server identifies as a teapot now and is on a tea break, brb

HTTP 418: I'm a teapot

The server identifies as a teapot now and is on a tea break, brb

Loose comparison Memes

Posts tagged with Loose comparison

PHP's Accidental Hash Collision Feature

php Programming Debugging Security
1 year ago 454.6K views 0 shares
PHP's Accidental Hash Collision Feature
Behold, PHP's infamous type juggling strikes again! The meme shows how md5('240610708') == md5('QNKCDZO') evaluates to true despite being completely different strings. What's happening? Both MD5 hashes begin with '0e' followed by digits, which PHP helpfully interprets as scientific notation (0×10^something). And since 0 raised to any power equals 0, PHP thinks both hashes equal zero. It's basically comparing 0==0. This is why strict comparison ( === ) exists in PHP. Without it, you might accidentally authenticate someone with the wrong password! Security nightmare fuel for any developer who values their sanity.

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