What are the potential pitfalls of using double quotes versus single quotes in PHP code?

Using double quotes in PHP code can lead to potential issues with variable interpolation, which can cause unexpected behavior or security vulnerabilities. It is generally recommended to use single quotes for string literals unless variable interpolation is needed. This helps to ensure that the code is more predictable and secure. 

// Use single quotes for string literals to avoid variable interpolation
$name = 'John';
echo 'Hello, ' . $name . '!'; // Output: Hello, John!

Keywords

double quotes single quotes string interpolation variable parsing syntax error

Related Questions