When outputting strings:
Single quotes (‘) with concatenation is faster than putting your variables inside a double quote (“) string.
echo 'a string ' . $name; // is faster than echo "a string $name";
OR even better:
Use echo’s multiple parameters instead of string concatenation.
echo 'this', 'is', 'a', $variable, 'string'; //is faster than echo 'this' . 'is' . 'a' . $variable . 'string';