What potential pitfalls should be avoided when concatenating strings in PHP?

When concatenating strings in PHP, it's important to avoid potential pitfalls such as forgetting to properly escape special characters or not using the correct concatenation operator. To ensure the concatenation is done correctly, it's recommended to use the dot (.) operator to join strings together and to properly sanitize any user input to prevent security vulnerabilities. 

// Correct way to concatenate strings in PHP
$string1 = "Hello";
$string2 = "World";
$concatenatedString = $string1 . " " . $string2;
echo $concatenatedString;

Keywords

concatenating strings PHP performance memory usage concatenation operator

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