How can syntax errors be avoided when concatenating strings in PHP code?

When concatenating strings in PHP code, syntax errors can be avoided by ensuring that the strings are properly enclosed within quotes and that the concatenation operator (.) is used correctly to join them together. Additionally, it's important to pay attention to any special characters or variables that need to be included in the concatenated string.

// Example of avoiding syntax errors when concatenating strings in PHP
$firstString = "Hello";
$secondString = "World";
$concatenatedString = $firstString . " " . $secondString;
echo $concatenatedString;