Curious about PHP’s quirks? Discover how type juggling, loose comparisons, dynamic properties, and other oddities can trip you up—plus what’s changed in PHP 8 to fix (or introduce) new surprises.

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PHP has numerous quirks and gotchas that can surprise developers, especially those coming from JavaScript. Key issues include type juggling with loose comparisons, unexpected string truthiness behavior, operator precedence problems, and array handling peculiarities. PHP 8 has addressed many of these issues with stricter type checking, the new match expression, union types, and the nullsafe operator, making the language more predictable and robust.

The Quirks And Gotchas of PHP

3. Variable Variables and Variable Functions