Why is it recommended to use single quotes instead of double quotes for string concatenation in PHP?

Using single quotes for string concatenation in PHP is recommended because PHP does not parse variables within single quotes, which can improve performance. When using double quotes, PHP will look for variables to parse, even if there are none, which can slow down the script. By using single quotes, you can avoid unnecessary variable parsing and improve the efficiency of your code. 

$name = 'John';
$age = 30;

// Using single quotes for string concatenation
echo 'My name is ' . $name . ' and I am ' . $age . ' years old.';

Keywords

single quotes double quotes string concatenation PHP best practices

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