PHP String Variables: Concatenation or Interpolation?

PHP Variable Insertion: Concatenation vs. Interpolation

When working with PHP, developers often need to insert variables into strings. This can be done in two ways: concatenation and variable interpolation.

Concatenation:

echo "Welcome " . $name . "!";

Interpolation:

echo "Welcome $name!";

Both methods produce the same result. However, the latter is shorter and simpler. It is also considered the more modern and preferred method.

Variable Interpolation with Arrays and Braces:

When working with arrays, variable interpolation can be used to access their elements. However, it requires using curly braces:

echo "Welcome {$name}s!";

Optimization:

While concatenation and interpolation methods do not significantly impact performance, concatenation can be optimized by avoiding multiple concatenation operations:

echo "Welcome ", $name, "!";

Ultimately, the choice between concatenation and interpolation is personal preference. Both methods are equivalent, but variable interpolation is more concise and readable.

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