What are the differences between single quotes and double quotes in PHP when using variables?

When using variables in PHP, single quotes and double quotes behave differently. Single quotes treat variables as plain text, while double quotes interpret variables and replace them with their values. If you want to include a variable within a string and have its value displayed, you should use double quotes. 

$name = "John";
// Using double quotes to display the value of the variable
echo "Hello, $name"; // Output: Hello, John

// Using single quotes will treat the variable as plain text
echo 'Hello, $name'; // Output: Hello, $name

Keywords

single quotes double quotes variables string interpolation PHP

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