In PHP, what are the implications of using single quotes versus double quotes when defining variables within strings?

When defining variables within strings in PHP, using double quotes allows for variable interpolation, meaning that the variable's value will be inserted into the string. On the other hand, using single quotes will treat the variable as a literal string, without interpolation. It is important to choose the appropriate quotation marks based on whether you want the variable's value to be included in the string or not. 

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

// Using single quotes for treating variable as a literal string
echo 'Hello, $name!'; // Output: Hello, $name!

Keywords

PHP single quotes double quotes variables strings

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