How can the use of single quotes ('') instead of double quotes ("") impact the performance and parsing of strings in PHP scripts?

Using single quotes ('') instead of double quotes ("") in PHP scripts can impact performance and parsing of strings because variables will not be parsed within single quotes. This means that PHP will not look for variables within single quotes, resulting in faster performance but limited functionality when it comes to variable interpolation. To ensure proper parsing of variables within strings, it is recommended to use double quotes ("") instead. 

$name = "John";
echo "Hello, $name"; // Output: Hello, John

// Correct way to use double quotes for variable interpolation
echo 'Hello, $name'; // Output: Hello, $name

Keywords

single quotes double quotes performance parsing strings

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