How can the use of single quotes versus double quotes impact variable interpolation in PHP echo statements?

When using single quotes in PHP echo statements, variable interpolation is not supported, meaning that variables will not be expanded within the string. To enable variable interpolation, double quotes should be used instead. This allows variables to be directly inserted into the string without concatenation. 

// Using double quotes for variable interpolation
$name = 'Alice';
echo "Hello, $name!"; // Output: Hello, Alice!

// Using single quotes without variable interpolation
echo 'Hello, $name!'; // Output: Hello, $name!

Keywords

single quotes double quotes variable interpolation PHP echo statements impact

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