The AWS SDK is 60 MB of vendor directory to sign one request. A presigned PUT is about forty lines, the browser uploads straight to S3 without touching your server, and you can cap the file size before a byte arrives.
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The invoice total is off by one paisa and nobody can find where. Float cannot represent 0.1, so it never could add up. Integer paise or DECIMAL, how to choose, and how to migrate a column that is already wrong.
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Shared hosting kills long-running processes, so queue:work is out. A cron-driven worker that exits on purpose, with a lock so two of them never overlap, and the memory and timeout limits that actually bite.
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CSRF is easier to understand as an attack than as a defence. Build the attack page first — it is nine lines — then the token makes obvious sense, and so does why SameSite cookies are not the whole answer.
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The page was fast with twenty rows and takes nine seconds with two thousand. Nothing is slow on its own — there are just two thousand of it. How to find an N+1, why eager loading is not always the fix, and the four that hide.
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The most common attack a small site actually sees, and the fix most tutorials get wrong: a per-IP limit locks out a whole office behind one NAT and misses the attack it was built for. A database-backed limiter that does neither.
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md5 and sha1 are still in production codebases, usually behind a salt somebody was proud of. What password_hash actually does, why the salt argument is gone, how to rehash on login, and the comparison that leaks.
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SQL injection in PHP explained with real vulnerable code, how an attacker exploits it, and the one fix that actually works: prepared statements with PDO and MySQLi.
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The bindec() function in PHP converts a binary string (base-2) into a decimal number (base-10).It accepts a string of 0s and 1s and returns the equivalent integer or float.This is useful for working with binary data, flags, permissions, or bitwise operations.It’s the opposite of decbin(), which converts decimal to binary.Example: bindec(“1101”) returns 13. Syntax bindec(string […]
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The base_convert() function in PHP is used to convert numbers between different bases, such as binary, decimal, octal, or hexadecimal.It accepts the number as a string, the base it’s in, and the base to convert to (ranging from 2 to 36).The output is always a string, regardless of base.Common uses include data encoding, binary/hex manipulation, […]
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