How can the use of single quotes versus double quotes impact the execution of PHP code within an echo statement?

When using single quotes within an echo statement in PHP, variables and escape sequences are not interpreted and will be displayed as is. However, when using double quotes, variables and escape sequences will be evaluated and replaced with their actual values. To ensure that variables are correctly interpreted within an echo statement, use double quotes instead of single quotes. 

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

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single quotes double quotes PHP code echo statement execution impact

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