How does using single quotes or double quotes affect the speed of PHP code execution?

Using single quotes or double quotes does not significantly affect the speed of PHP code execution. However, using single quotes is generally more efficient as PHP does not have to parse for variables within the string. Double quotes allow for variable interpolation, so if you do not need to include variables in your string, it is recommended to use single quotes for better performance. 

// Using single quotes for better performance
$name = 'John';
echo 'Hello, ' . $name . '!'; // Output: Hello, John!

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single quotes double quotes PHP code execution speed performance

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