How can variables be properly inserted into strings in PHP to avoid displaying variable names instead of values?

When inserting variables into strings in PHP, it is important to enclose the variable within curly braces {} to ensure that the actual value of the variable is displayed instead of the variable name. This is known as variable interpolation. By using curly braces, PHP will correctly interpret the variable and display its value within the string. 

$name = "Alice";
$age = 25;

// Correct way to insert variables into a string
echo "My name is {$name} and I am {$age} years old.";

Keywords

PHP string interpolation concatenation sprintf variable substitution

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